sorry posted these in wrong place, can anyone help plz?

can i just put £2 a week through, (if thats still the amount) or do we have to tot up all petty cash,
what happens if he hasnt got receipt??
as local shops dont give receipts and also (seperate question from canteen costs) ...he has lost half of his petrol receipts which will in effect show motoring expenses being less than really are.

This should be last question honest!! thanks for your help!!