The 16 overhead doors on your loading dock must be replaced now. The deluxe model costs $2,200 each and wil last for six years. The standard model costs $1600 each and will last for four years. The deluxe model is aluminum, so it will hve a scrap value. The use of the deluxe model on the loading dock will also save your company $1000 per year in heating costs because of its ablitity to seal better. if you use a marr of 12% and present worth analysis , which door will you recommed?