Please help with these practice problems! Thanks

The breakeven (NPW=$0) dollar value (nearest $100) of the initial cost parameter (P) is a) 470,000; b) 483,000; c) 510,400; d) 523,100. 18. The breakeven (NPW=$0) dollar value (nearest $100) of the annual revenue parameter (AOR) is a) 291,300; b) 293,400; c) 298,900; d) 305,500.

I. Initial Cost (P) = $450,000 2. Salvage value (SV)= $45,265 3. Annual operating revenues (AOR) = $300,000 4. Annual operating costs (AOC)= $180,000 5. Economic life (N) = 5 years 6. MARR= 10% 7. Inflation Rate=0% One-way Sensitivity Table Net Present Worth (NPW Parameters -15% -10%| -5% | Reference l +5% +10% +15% Scenario AOR AOC SV MARR