"we look up a number in the phone book, push the book away, and then begin to dial the number. why do we discourage an interruption during this process?

Acompany that uses the periodic inventory system provided the following information: 1. beginning inventory $ 5 comma 0002. purchases $ 150 comma 0003. purchase discounts $ 2 comma 1004. purchase returns and allowances $ 1 comma 000at the end of the period, the physical count of inventory reveals that $ 16 comma 000 worth of inventory is on hand. what is the amount of cost of goods sold?