2) draw cash flow

Tewit bought a CNC machine 5 years ago for a price of 2,000,000 baht. Currently, this CNC machine has been used to lathe 150,000 pieces of work. From the condition of the CNC machine at this time, Tevit can use the CK machine for another 3 years or can sell CNC machines at a price of 700,000 baht. After today, the value of CNC machines has decreased evenly to 250,000 baht at the end of the third year. If Tawit decides that he will continue to use such CNC machines, he will have to pay for maintenance and maintenance. CNC machine insurance costs 200,000 baht per year, but if Tevit decides to buy a new CNC machine with a price of 2,500,000 baht, which makes the value of this CNC machine equal to 1,000,000 baht at the end of the fifth year and the dealer will be responsible for the cost. Repair, maintenance and insurance for CNC machines for the first 4 years only, after which Tevit will be responsible for such expenses by himself 300,000 baht per year from the analysis of the lowest service life (Economic Service Life, ESL) at Interest rate of 10% per year, should Te Wit choose to use the next CNC machine today or buy a new CNC machine today and specify the reasons