Aubry, a cash basis and calendar year taxpayer, decides to reduce his taxable income for 2018 by buying $65,000 worth of supplies for his business on December 27, 2018. The supplies will be used up in 2019-

a. Can Aubry deduct the expenditure for 2018? Explain.
b. Would your answer in part (a) change if Aubry bought the supplies because the seller was going out of business and offered a large discount on the price? Explain.