Answer:
September 1, 202x, petty cash fund established
Dr Petty cash fund 220
Cr Cash 220
September 10, 202x, petty cash expenses and replenishment of petty cash fund
Dr Postage expenses 78
Dr Supplies expenses 51
Dr Cash short and over 15
Cr Cash 144
September 15, 202x, petty cash fund is increased
Dr Petty cash fund 85
Cr cash 85