Kindly explain in detail or else i will give dislike

ne data on the running costs per year and resale price of equipment A whose purchase prices is 1200,000 are as follows : What is the optimum period of replacement? When equipment A is two years old, equipment B which is a new model for the same usage is ovalable. The optimum period for replacement is 4 years with an average cost of 72,000. Should equipment A changed with equipment B ? If so, when? ne data on the running costs per year and resale price of equipment A whose purchase prices is 1200,000 are as follows : What is the optimum period of replacement? When equipment A is two years old, equipment B which is a new model for the same usage is ovalable. The optimum period for replacement is 4 years with an average cost of 72,000. Should equipment A changed with equipment B ? If so, when