Carl moving Ltd cut lawns,it has riding lawnmover with book value 5000 and remaining useful life 5 years.A new lawn mover is available with cost $15000.The useful life of new machines is 5 years.Carl estimates that new machine allow her to cut more lawns and increase revenue from 20000 per year to 22000 and reduce variable cost from 12000 to 10500.prepare an

analysis showing whether Carl should retain the old or buy new?