Answer:
FBS Corporation should credit Merchandise Inventory account for $800
Explanation:
Since FBS uses the gross method to record purchases on account, it records invoices without considering any possible cash discounts. So the value recorded for the purchased merchandise was $800 higher than the real price. Therefore the company should credit the merchandise inventory account for the total cash discount:
cash discount = (total purchase - returned merchandise) x 2% = ($44,000 - $4,000) x 2% = $800