An office manager has $10,000 to spend on new equipment. He planned to purchase 300 lamps for $72 each. He completed the calculations at the right and concluded that there would be plenty of money left to buy additional equipment. 300 x 72 =
(300 x 7) + (300 x 2) =
2,100 + 600 = 2,700
Part A 1) What does the office manager do to support his thinking?

Part B 2) Does the office manager’s conclusion make sense? Explain.