Answer: See explanation
Explanation:
The journal entry to correct the errors is given below:
a. Dr Cash $8400
Cr Account receivable $8400
b. Dr Supplies $2500
Cr Office equipment $2500
Dr Supplies $2500
Cr Account Payable $2500
Note that the first entry that's given in (b) above reverses the incorrect entry. On the other hand, the second entry simply records the correct entry.