Answer:
B) Credit to refund liability of $280,000
Step-by-step explanation:
The total estimated returns are 85 of the total sales = 8% x $21,000,000 = $1,680,000.
Since the company had already accounted for $1,400,000 in returns, the adjusted necessary should be = total returns - accounted returns = $1,680,000 - $1,400,000 = $280,000
Since the refund liability account must increase, and it is a liability account, it should be credited.