How does your profit change under these conditions?
+ What is ROI in farming?
Return on Investment (ROI) = (Net Profit ÷ Total Cost) × 100. A 30% ROI means for every 100 you invest, you earn back 130. African smallholder farming typically yields 15–50% ROI for well-managed crops in good seasons.
+ Why does post-harvest loss matter so much?
Post-harvest losses are Africa's silent profitability killer. Losing 25% of your cassava harvest to rotting eliminates much of your profit. Hermetic storage bags (PICS, ZeroFly) can reduce cereal losses from 20% to under 2%. The calculator shows exactly how much each percentage point of loss costs you.
+ Why process before selling?
Processing adds value: cassava root → garri (2.5–3× revenue), paddy → milled rice (1.8–2×), oil palm fruit → palm oil (3–4×). The trade-off is processing cost and time. Use the “Process then sell” option to compare.