Under a Periodic Inventory System, If Inventory at the Start

Multiple Choice

Under a periodic inventory system, if inventory at the start of the period is $15 000, purchases for the period are $73 000 and inventory at the end of the period, as per a physical stocktake is $20 000, what is the estimated cost of sales?

A) $68 000
B) $108 000
C) $88 000
D) $53 000