Help me with this replacement decision question

Ak uche & sors eld is trying to decadere frequency of replacemeist for a machine that compairy have just deeded to Purchase The machine cost $225,000 and has an operceturg like of 3 years resale cake and relirrung cost for the machine each year over his life has been estimated as follows Year Resale ealee /Reering cost 180,ovo 36ro 135, oro 54,oro 26, oro 72,ooo or 1 IdM 3 The coming cost of capital is (30% D Use the equaleat anneal cost method to determine the optima no replacement policy 10) use the lowest common mutiple method to justify four decision Cigrure Taration)