The table below lists a number of financial transactions in a year for a firm. Using MACRS and US Tax code, determine the cash flow, income tax and after tax profit of the firm for the year.

Sales	$ 300,000
Operating expenses	$ 50,000
Manufacturing cost	$ 50,000
3rd annual payment on a loan of $100,000 of 6 years at 8% per year compounded annually
Purchase of a piece of land for $200,000
Sale of a machine for $30,000 with a book value of $20,000 Depreciation expense of existing assets	$30,000

the answer is following, how can i approach this?

Cash flow	142,773
Income tax	58,095
After tax profit	112,773