Assumptions. Weeks start Monday. A/R = invoices not paid, void or archived, landing on their due date plus the collection lag. Bills = unpaid bills on their due date. Recurring = active rules expanded forward from next at their frequency, stopping at each rule's end date. Opening cash is derived from posted ledger transactions (income + donations + grants + transfers in, less expenses and transfers out) and can be overridden above. GST remittances, payroll runs not set up as recurring rules, and loan draws are not modelled.