Fish, Inc., an exempt organization, reports unrelated business income of $500,000 (before any charitable contribution deduction). During the year, Fish makes charitable contributions of $54,000, of which $38,000 is associated with the unrelated trade or business. 

a. Calculate Fish’s unrelated business taxable income (UBTI). 

b. Express your computation in part (a) as a Microsoft Excel formula. 

c. Assume instead that the charitable contributions are $41,000, of which $38,000 is associated with the unrelated trade or business. Calculate the UBTI.