+ Sales COGS Accounts Receivable Accounts Payable Inventory Discount Rate (1) $4,500,000 $2,000,000 $1,250,000 $50,000 $1,100,000 8.4% 7. What is the NPV of collecting accounts receivable an average of 10 days early on a one- time basis? 8. What is the NPV of collecting accounts receivable 10 days early on a perpetual basis? 9. For questions 6 and 7, a rate of 8.4% was used as the discount rate. Is this reasonable? What interest rate should be used for changes in working capital? + Sales COGS Accounts Receivable Accounts Payable Inventory Discount Rate (1) $4,500,000 $2,000,000 $1,250,000 $50,000 $1,100,000 8.4% 7. What is the NPV of collecting accounts receivable an average of 10 days early on a one- time basis? 8. What is the NPV of collecting accounts receivable 10 days early on a perpetual basis? 9. For questions 6 and 7, a rate of 8.4% was used as the discount rate. Is this reasonable? What interest rate should be used for changes in working capital