Correct arithmetic and include omitted overhead, refunds and cash timing before interpreting profitability. Narrow break-even at listed costs is2.5%response, not a forecast.
This is a proposed campaign with an assumed response rate, not a reported test outcome.
The illustrative33,000-name mailing assumes4%orders at20 dollars:26,400 revenue less13,200 mailing and5,280 fulfillment leaves7,920, not the printed9,920.
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Chapter9, hypothetical customized report campaign
Inputs and printed error checked visually onPDF74; calculation independently recomputed. Verification covers source capture and arithmetic, not market response.
Calculation and inference
33,000 ×4% =1,320 orders.1,320 ×20 =26,400 revenue.33 ×400 =13,200 mailing.1,320 ×4 =5,280 fulfillment. Remainder7,920 before omitted costs. At16 contribution/order before mailing,400 per thousand needs25orders to cover those mailing costs.
The useful transferable method is an explicit assumption-to-cost bridge. The source's4%response remains hypothetical.
