In 2020, MSU Corporation has $500,000 of adjusted taxable income, $22,000 of business interest income, and $120,000 of business interest expense. It has average annual gross receipts of more than $25,000,000 over the prior three taxable years.

a. What is MSU's interest expense deduction for 2020? $

b. How much interest expense can be deducted for 2020 if MSU's adjusted taxable income is $300,000? $