Discounted price
Find a sale price from a price multiplier, or work backwards from an actual item payment. The multiplier follows the Taiwan out-of-ten discount notation.
Understand the numbers · Make life easier
Compare unit prices
Compare package offers using the same weight, volume or item unit. Enter the complete promotional set rather than the price of just one package.
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Lower unit price
14.24TWD/100 g
Compares price for the same weight or volume. Include free packages in the count without deducting their value again.
B has the lower unit price paid.
A: unit price15.44 TWD/100 g
A: amount paid now139 TWD
A: later rewards (excluded from unit price)0 TWD
B: unit price14.24 TWD/100 g
B: amount paid now299 TWD
B: later rewards (excluded from unit price)0 TWD
Enter the promotional total price for all packages together, subtract cash discounts usable now, then add shipping for the entire set. Rewards appear separately and do not reduce payment now. Quality, shelf life and waste are excluded.
Method and scope
For a price per 100 g or 100 mL, use (set price - immediate discount + shipping) / (quantity per pack * pack count * unit factor) * 100, with the unit factor converting quantity to grams or millilitres. All three quantity factors belong in the denominator; for a price per piece, omit the final * 100.
Later rewards are listed separately because they are not yet cash discounts. The lowest unit price only compares products with compatible dimensions.
Confirm promotional minimum spending yourself and include free packs without subtracting them again. Quality, expiry dates and the usefulness of extra quantity still matter.
What this helps you do
Compare package offers using the same weight, volume or item unit. Enter the complete promotional set rather than the price of just one package.
What to enter
Start with products to compare, then fill the other relevant fields in the units shown. The field hints explain the required format and examples.
How the calculation works
For a price per 100 g or 100 mL, use (set price - immediate discount + shipping) / (quantity per pack * pack count * unit factor) * 100, with the unit factor converting quantity to grams or millilitres. All three quantity factors belong in the denominator; for a price per piece, omit the final * 100.
Worked example
A buy-two-get-one-free set containing three 500 g packs for TWD 180 costs TWD 12 per 100 g before other costs. Enter pack count 3 and set price 180.
Understanding the answer
Later rewards are listed separately because they are not yet cash discounts. The lowest unit price only compares products with compatible dimensions.
Scope and limitations
Confirm promotional minimum spending yourself and include free packs without subtracting them again. Quality, expiry dates and the usefulness of extra quantity still matter.