Cost of acquiring customer(CAC) – Marketing expenditure/No.of customers acquired 

unit economics

Sales                                   xx

(-)Cost of Goods sold       xx

 Gross Profit                   xx

(-)Payment gateway charges(Razorpay)      xx

(-)Logistics/Shipping                        xx

(-)Marketing Expenses                       xx

(-)Salaries                                            xx

Contribution margin 2

fixed cost

Earnigs before interest tax and depreciation

-)interest

Earnings before taxes

-)Taxes

Earnings after taxes