Renee operates a proprietorship selling collectibles over the Web. This year, Renee's business reported revenue of $$95\mathrm{.}5$ million and deducted $$88\mathrm{.}6$ million in expenses and loss carryovers. Her business deductions included cost of goods sold of $$48\mathrm{.}5$ million, sales commissions paid of $$16\mathrm{.}9$ million, $$10\mathrm{.}5$ million of interest paid on a mortgage, $$10\mathrm{.}7$ million of depreciation, and $$2$ million deduction for a net operating loss carryover. a$.$ What is Renee's adjusted taxable income for purposes of calculating the limitation on business interest expense?

b$-1.$ What is the maximum amount of business interest expense that Renee can deduct this year?

b$-2.$ How is the disallowed interest expense $($if any$)$ treated? Interest disallowed would be:c$.$ Suppose that Renee's revenue includes $$5$ million of business interest income. What is the maximum amount of business interest expense that could be deducted this year under the business interest limitation$?$ c$.$ Suppose that Renee's revenue includes $$5$ million of business interest income. What is the maximum amount of business interest expense that could be deducted this year under the business interest limitation$?$