# Discount Stack Calculator MCP for AI Agents AI Agent Connect > Discount Stack Calculator handles complex retail pricing by compounding multiple discount types and applying specific regional tax rules. It calculates final totals for items with sequential percentage drops, fixed coupons, and spend-based rewards. It also manages BOGO logic and determines if taxes apply to the pre- or post-discount subtotal. ## Overview - **Category:** finance - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_t7c7f4bZivH4I71Oxbl3gg7eLK1jrleinSy0ydfj/ai-agent-connect - **Tags:** pricing, discounts, taxation, bogo, ecommerce-tools ## Description Retail math gets messy fast once you start stacking deals. If you're trying to figure out the final price of an item that has a 20% off sale, a $10 coupon, and a "spend $100 get $5 off" reward, doing it in your head or a basic calculator is a recipe for errors. This Connector takes the heavy lifting off your plate by acting as a dedicated pricing engine for your AI client. It handles the order of operations for you, making sure that sequential discounts hit the right numbers every time. You can use it to build out complex promotional structures or to audit existing pricing for accuracy. Because it's hosted on the Vinkius catalog, you can plug it into your existing AI setup and start getting precise totals instantly. It's built for the messy reality of commerce where taxes, bundles, and multi-layer coupons often collide. Instead of toggling between three different tabs to check a regional tax rate or manually calculating a "buy one, get one" bundle price, you just tell your agent what the deal is. It handles the logic of whether a tax applies to the original price or the discounted subtotal, ensuring your final numbers are correct. This is about moving away from manual "guess and check" pricing and toward a system that handles the nuances of modern retail. You get a reliable way to verify that your promotions are actually making sense before you push them live to your customers. ## Tools ### regional_taxation Applies local taxes to either the original or discounted price. It handles the complexity of different regional tax laws. ### threshold_incentive Checks if a purchase meets the amount needed for a reward. Use it to evaluate spend-based discount eligibility for a customer. ### bogo_logic Calculates the final price and quantity for Buy One Get One deals. It helps you see exactly how many items are free and the final cost. ### fixed_reduction Subtracts a specific dollar amount from a subtotal for coupons. This is useful for applying flat-rate rewards to a transaction. ### percentage_stacking Compounds multiple percentage discounts in a specific order. It returns the new subtotal and the total savings percentage. ## Prompt Examples **Prompt:** ``` I have a $200 laptop. It's 10% off, then there's a $50 coupon. What's the final price? ``` **Response:** ``` The final price is **$135.00**. Here is the breakdown: * **Original Price:** $200.00 * **After 10% Discount:** $180.00 * **After $50 Coupon:** $135.00 ``` **Prompt:** ``` If a customer buys 3 hats for $30 each with a BOGO deal, how much do they pay? ``` **Response:** ``` The customer pays **$60.00**. Since it's a Buy One Get One deal, they get 1 hat free. They pay full price for 2 hats and get the 3rd one free. ``` **Prompt:** ``` A $100 item has a 15% discount and a 5% tax. Does the tax apply to the $85 or the $100? ``` **Response:** ``` That depends on your regional rules: * **Post-discount tax:** The total is **$89.25** (Tax applied to $85.00) * **Pre-discount tax:** The total is **$100.75** (Tax applied to $100.00) ``` ## Capabilities ### Calculate BOGO impacts Determine the final price and quantity for Buy One Get One deals. ### Apply fixed currency coupons Subtract specific dollar amounts from a subtotal for flat-rate rewards. ### Stack multiple percentage discounts Compound multiple percentage drops sequentially to find the final price. ### Evaluate spend-based rewards Check if a purchase meets the required amount to qualify for a discount. ### Calculate regional tax totals Apply local taxes to either the original or the discounted price. ## Use Cases ### Verifying complex holiday bundles A retail manager wants to see the final price of a jacket with 20% off, a $10 coupon, and a 'spend $100, get $5 off' deal. ### Checking BOGO profitability with tax An e-commerce owner needs to know if a BOGO sale on shoes is profitable after 8% sales tax is applied to the discounted price. ### Auditing multi-state tax rules A pricing analyst is checking if a 'Buy one, get one 50% off' deal works correctly across three different states with different tax laws. ### Calculating loyalty program savings A marketing lead wants to know the total savings percentage for a customer who stacks a 10% seasonal discount with a 5% loyalty coupon. ## Benefits - Stop guessing on order of operations with percentage_stacking to ensure discounts hit the correct numbers. - Handle complex BOGO offers instantly using bogo_logic to see exactly how many items are free. - Avoid tax errors by using regional_taxation to toggle between pre and post discount tax bases. - Automate spend-based rewards with threshold_incentive to see if a customer qualifies for a gift. - Apply fixed coupons quickly with fixed_reduction to get a clean final price for every transaction. ## How It Works The bottom line is it turns complex retail math into instant, accurate pricing data. 1. Connect your AI client to the Discount Stack Calculator MCP. 2. Describe the item price, the list of discounts, and the regional tax rules. 3. Get the final transaction total and a breakdown of total savings. ## Frequently Asked Questions **How does the Discount Stack Calculator handle multiple coupons?** It handles them by applying them in the order you specify. You can stack percentage drops and fixed dollar reductions to see how they affect the final price. **Can I use the Discount Stack Calculator for BOGO sales?** Yes, it specifically handles Buy One Get One logic. It calculates how many items are free and what the final total is for the entire bundle. **Does this Connector work for regional taxes?** It does. You can tell your agent whether the tax should be calculated on the original price or the price after discounts are applied. **Is the Discount Stack Calculator good for e-commerce?** It's perfect for e-commerce because it handles the complex math of spend-based rewards, like 'spend $100, get $10 off' incentives. **Can I see how much a customer actually saves?** Yes, the Connector provides the total savings percentage. It shows you the difference between the original price and the final discounted total. **What happens if I have three different discounts at once?** The Connector compounds them sequentially. It applies each discount one by one to the running subtotal to give you a perfectly accurate final price. **How does percentage stacking work?** The engine uses a multiplicative approach. For example, applying a 20% discount followed by a 10% discount results in an effective total reduction of 28%, not 30%. Use the `percentage_stacking` tool to calculate this accurately. **Can I calculate taxes for different regions?** Yes. The `regional_taxation` tool allows you to specify whether tax should be applied using 'pre_discount' or 'post_discount' logic, accommodating both US and European VAT standards. **Does it support BOGO promotions?** Yes, the `bogo_logic` tool handles patterns like 'buy_one_get_one_free' and 'buy_two_get_one_free', calculating exactly how many units are at full price and the total savings achieved.