Explanation:
The journal entries are shown below:
a.
Petty cash A/c Dr $750
To Cash A/c $750
(Being the establishment of petty cash is recorded)
b.
Office supplies $248
Miscellaneous selling expense $212
Miscellaneous administrative expense $96
Cash short and over $18 ($750 - $556 - $176)
To Petty cash A/c $574
(Being the replenishment of petty cash fund is recorded)