What is the impact on NPV for a single sale if the new proposal is accepted? $42,627 $539,360 $496,734 $6,394,013 Single sale impact. Use the following information for next 4 questions A customer presently buys $500,000/month from your firm. It has promised to increase sales by 10% if you offer it 90-day terms (you presently extend 30-day terms). Your firm's opportunity cost is 8%. PV = FV / [1 +(\/365)(n)] PV perp = CF k Cash Flow Per Period Interest Rate Per Period