Answer:
Assets and liabilities are reduced by $3,300.
Explanation:
The effect that the return of merchandise to the supplier have on the accounting equation is that Assets and liabilities are reduced by $3,300 because the purchase return will decrease assets or reduced the assets which is the merchandise inventory and decrease liabilities or reduced the liabilities which is accounts payable by $3,300 which is said to be the full invoiced amount of the merchandise returned.