Can I enter coupon codes or flat discounts?
Convert flat discounts to a percentage of the subtotal or subtract them from the unit price before entering the numbers.
Step-by-step walkthrough
Discount & Final Price Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- discount
- sales tax
- final price
Detailed procedure
Step 1
Enter the unit price and quantity.
Step 2
Add the discount percent and local tax rate if applicable.
Step 3
Review the breakdown for subtotal, discount, tax, and the all-in total.
Teaching & troubleshooting tips
Does it handle VAT-inclusive pricing?
Yes. Set tax to zero to see the price before VAT, or include your VAT percentage to view the total you’ll pay at checkout.