Account Receivable

One of the accounting staff who is in charge for account receivable, has just purchased a $35,000 apartment in cash. The staffs salary was $2,500 per month. The accounting data was as follow:

Collections from customers $ 198,000

Merchandise purchased 320,000

Ending merchandise inventory 70,000

Goods are marked to sell at 40% above cost. Assume all sales were made on account.

The balance shown in ledger was $117,000.

Based on the data, should the management investigate the difference in account receivable calculated?