3- Two flocks of equipment, each costing 10,000 dinars, the sum of their sale and the cost of operating them one thousand dinars) within five years are shown in the table the children of the required a- Calculate the optimal time for replacing each of the two appointments, based on the average annual cost - according to the drawing of a lot (a) Which is better C- Clemma- If the company's policy of exchange is at the end of each year, which one would recommend acquisition? Year 1234 5 9987 5 1123 3 Resale 1 Operating cost 8 7 7 6 6 1 2 23 4 Resale Operating cost B