Net Present Value Method-Annuity bulldozer operation. Present Value of an Annuity of $1 at Compound Interest a. Determine the equal annual net cash flows from operating the bulldozer. Use a minus sign to indicate cash outflows. Briggs Excavation Company Equal Annual Net Cash Flows Cash inflows: $ $ Cash outflows: $ $ sign to indicate a negative net present value. c. Should Briggs Excavation invest in the bulldozer, based on this analysis? 1 , because the bulldozer cost is the present value of the cash flows at the minimum desired rate of return of 10%. hours