Use the following to answer questions 2022 At the beginning of the year; MB, Inc.'s allowance for uncollectible accounts had a beginning balance of $5,000. On January 22nd,MB wrote off the A/R from customer C for $620 2 21. By the end of the year (December 31st ); total accounts written off were $4,920 (including the write off for customer C). What is the balance in the allowance for uncollectible accounts after all the writeoffs? 22. $ How much did bad debt expense change when the company wrote off the accounts receivables