What is the discounted payback period for Model 334A (in years)? Is the DPBP greater than the planning horizon?

edit: dont worry sbout the planning horizon just please find the DPBP

Chapter 04, Problem 050 Octavia Bakery is planning to purchase one of two ovens. The expected cash flows for each oven are shown below. MARR is 9%/ year. Model 127B Model 334A Initial Investment $77,000 Estimated Life End of Life Salvage $55,000 10 $8,000 $19,800 $9,800 $0 Annual Income Annual Expense $27,500 $6,300