Tony's Pizzaria, owned by my cousin Tony (True!), is looking for a new pizza oven (Not really). Two alternatives are:

Model 1: Cost $30,000, estimated life 10 years, Salvage value $4,000, annual income $9,400, annual expenses $5,000

Model 2: Cost $40,000, estimated life 5 years, Salvage $2000, annual income $13,000, annual expenses $ $3,000

Find the discounted payback period for each if MARR is 6%. If their criterion is minimum DPBP, which should they buy?