A)Elmdale Company has a machine that affixes labels to bottles. The machine has a book value of $80,000 and a remaining useful life of 3 years and no salvage value. A new, more efficient machine is available at a cost of $300,000 that will have a 5-year useful life with no salvage value. The new machine will lower annual variable production costs from $520,000 to $410,000.

Instructions make analysis showing whether the old machine should be retained or replaced. Show Calculations

Note: please, explain exactly from where we got the numbers for answer