Discount & Sale Price Calculator
Find your final price after sales discounts, promotional coupons, and sales tax. Supports double/stacked percentage discounts.
PARAMETERS(4)
LOAD VERIFIED SCENARIO
ACTIVE COMPUTATION
Final Out-of-Pocket Price
$85.60
Total Savings: $20.00
Price Before Tax
$80.00
Sales Tax Amount
$5.60
Effective Total Discount
20.0%
MATHEMATICAL FORMULA & GOVERNING PRINCIPLES
Final = Price * (1 - Discount/100) * (1 + Tax/100)
Computes primary discount, applies optional second promotional discount, and calculates final checkout price including sales tax.
FREQUENTLY ASKED QUESTIONS (FAQ)
How do stacked discounts work?
Stacked discounts are applied sequentially, not additively. For example, 20% off plus an extra 10% off does NOT equal 30% off. The 10% is deducted from the already discounted 80% price, resulting in a true 28% total discount.
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