Answer:
a. Computation of cash flow
Earnings before depreciation and taxes $123,000
Less: Depreciation $41,000
Earnings before taxes $82,000
Less: Taxes ($82,000*35%) $28,700
Earnings after taxes $53,300
Add: Depreciation $41,000
Cash Flow $94,300
b. If Depreciation = 21,000
Computation of cash flow
Earnings before depreciation and taxes $123,000
Less: Depreciation $21,000
Earnings before taxes $102,000
Less: Taxes($102,000*35%) $35,700
Earnings after taxes $66,300
Add: Depreciation $21,000
Cash Flow $87,300