Sales formulas

Enter Fixed costs ($), Price per unit ($), and Variable cost per unit ($) for the Break-Even Units Calculator; retain the units printed in each label. The calculator reports Units to break even and Break-even revenue: Break-even units = fixed costs ÷ contribution per unit. Price per unit must exceed Variable cost per unit for break-even to be attainable.

Enter Item A ($), Item B ($), Item C ($), and Bundle discount (%) for the Bundle Discount Calculator; enter percentage fields as percentage points and retain the units printed in each label. The calculator reports Full price, Discount, and Bundle price: Sum item prices, then apply a package percent off. Discount assumptions may differ if item-level promotions or tax rules also apply.

Enter Sales ($) and Commission rate (%) for the Commission Calculator; enter percentage fields as percentage points and retain the units printed in each label. The calculator reports Commission ($): Commission is sales times commission rate. Commission ($) is gross commission before taxes, chargebacks, or tiered-rate rules.

Amount saved is the original price times the discount rate.

Sale price is original minus saved.

Balance equals price minus down payment.

Each installment divides the balance evenly.

Profit is revenue minus cost.

Margin is profit divided by revenue as a percent.

Enter Mode (0=markup→margin, 1=margin→markup) and Percent value for the Markup Margin Converter; use only the listed mode or unit codes and enter percentage fields as percentage points. The calculator reports Converted percent: Markup is profit/cost; margin is profit/price. Use mode 0 or 1 exactly, and keep margin below 100% when converting to markup.

Enter Price ($), Coupon (%), and Tax (%) for the Price After Coupon and Tax; enter percentage fields as percentage points and retain the units printed in each label. The calculator reports After coupon, Tax, and Total: Apply discount first, then tax on the discounted price. Tax treatment and coupon order can vary by jurisdiction or merchant.

Divide net profit by revenue, then scale to percent.

Markup amount is cost times the markup rate.

Selling price is cost plus markup.

Tip equals bill times tip rate.

Total is bill plus tip.

Subtotal is price times quantity.

Tax and total follow from the rate.