Shanna, a calendar year and cash basis taxpayer, rents property to be used in her business from Janice. As part of the rental agreement, Shanna pays $16,600 rent on April 1, 2021, for the 12 months ending March 31, 2022. Do not round any division. a. How much is Shanna's deduction for rent expense in 2021? 8,400 X Incorrect b. Assume the same facts, except that the $16,600 is for 24 months' rent ending March 31, 2023. How much is Shanna's deduction for rent expense in 2021? 3,150 X Feedback Check My Work A taxpayer's accounting method is a major factor in determining taxable income. The method used determines when an item is includible in income and when an item is deductible on the tax return