Build a PPC budget forecast from clicks to customersUse a worked three-channel forecast to connect media spend, CPC, lead quality and close rates. Download the Excel workbook and test which assumptions change the decision.Budget advertising around cash collection timingBuild a cash calendar for advertising spend, billing, payment settlement, customer collections, refunds, and operating commitments before approving expansion.Build three ad-spend scenarios for next monthPlan conservative, base, and expansion advertising scenarios with explicit response assumptions, contribution, capacity, cash requirements, and decision triggers.Calculate allowable CAC from a first orderBuild a first-order acquisition-cost ceiling from retained revenue, variable costs, required contribution, and a clear definition of new customers.Calculate break-even ROAS with contribution marginCalculate an advertising break-even ROAS from retained revenue and variable costs, then separate that threshold from overhead, profit targets, and attribution claims.Use marginal ROAS for a budget increaseEvaluate an advertising budget increase using additional spend, additional value, contribution, uncertainty, and an honest distinction between observed and causal changes.Use MER and platform ROAS in a budget reviewCompare business revenue-to-marketing-spend efficiency with platform-attributed ROAS using consistent cost scope, revenue definitions, and decision roles.Separate new-customer CAC from blended acquisition costsDistinguish media cost per order, media cost per new customer, and total CAC with consistent identity, cost scope, acquisition cohorts, and repeat-order treatment.Build a monthly ad budget pacing sheetTrack monthly advertising budgets with completed spend, remaining authorization, scheduled commitments, data freshness, daily plans, and exception ownership.Model a discount before increasing ad spendCalculate how a promotion changes contribution per order, required sales volume, allowable acquisition cost, and the advertising evidence needed to expand spend.Measure subscription CAC payback by cohortTrack subscription acquisition-cost recovery with acquisition cohorts, realized contribution, churn, expansion, service costs, and separate cash timing.How to measure the ROI of AI creative testingEvaluate AI creative testing with accepted-output costs, review time, realized savings, controlled experiments, and incremental contribution rather than ROAS alone.