Please explain the calculations, kindly do the calculations without excel. Im posting this question to understand the calculations. Thank you.

Question #2 (5 Marks) Contect Systems has the opportunity to invest in one of three mutually exclusive machines that will produce the product that it will need for the foreseeable future. Machine A costs $2.5 million and has after-tax inflows of $900,000 per year for 5 years. Machine B costs $3.4 million and has after tax cash inflows of $800,000 per year for 9 years. Machine C costs $4.3 million and has after tax cash inflows of $700,000 per year for 13 years. Assume that machine prices are not expected to rise because inflation will be offset by cheaper components used in the machines. The cost of capital is 12%. What machine should be chosen (if any)