Using transactions listed in E6-4, indicate the effects of each transaction on the liquidity metric days' sales

Question:

Using transactions listed in E6-4, indicate the effects of each transaction on the liquidity metric days' sales in receivables and profitability metric return on sales.
In E6-4
March 18 Received $5,000 on an account and wrote off the remainder owed of $10,000 as uncollectible.
Aug. 29 Reinstated the account that had been written off on March 18 and received $10,000 cash in full payment.