Your boss is very puzzled by the finance courses in his MBA program. He has learned that “cash flow is king,” but notices that the capital budgeting  problems spend a lot of time and effort dealing with depreciation and CCA but not with interest expenses. He knows that depreciation and CCA are non-cash expenses, and he knows that interest is definitely a cash expense. He would like an explanation of why he needs to bother with depreciation and CCA and not with interest expense.