How much we need for start-up supplies . . . . . $25
AFTER start-up supplies we want to have . . . $70
Total amount we need to get started . . . (25 + 70) = $95
Number of people contributing . . . (me + 4) = 5
Amount each person needs to kick in . . . (95/5) = $19
As your preliminary Accountant, please reserve me one dozen (13) bagels from the first batch you produce !