On the Deliveries tab, log each green leaf delivery with the date and the kilos. On Payments, record what the factory pays you, both the initial monthly rate and the later bonus, so nothing is forgotten. On Costs, capture fertiliser and the plucking and maintenance labour that are the grower's biggest expense.
The Monthly Summary pulls it together: kilos delivered, payments received and costs, and the net income for each month. Yellow cells are your only inputs; the rest are locked formulas. The premium version works out the price you actually realised per kilo and your cost per kilo, and prints a clean monthly statement. Opens in Excel or Google Sheets.