by how much does the net realizable value of accounts receivable change from before to after the right off?

If Jan. credit sales for Levine were $10047 and AR has a balance of $20355, the company belioves 5% of credit sales or 20% of AR are uncoliectible and Allowance for Doubdul Accounts has a credit balance on Jan. 1 of $5555 Note: you may not require all given information to answer. If the company writes off $672 on January 10, by how much does the Net Realizable Value of Accounts Receivable change from before to after the write-ofr? NOTE: you may not require all given information to answer. Round ONLY your final answer to the nearest dollar