Annual profit hides the month you run out of money. Lay twelve months across a page. In each month write what leaves and what arrives, using real cycle dates, not an even spread.
Money leaves early: compost or straw, spawn, casing, fuel, wages. Money arrives late, after picking and after the buyer's credit period. In a six cycle year with rooms filled one after another, the next cycle's outflow lands before the last one's inflow clears.