Please solve the whole Question within 1 hour. Read the instructions carefully; thanks.

At January 01, 2021, Cadd Inc. had a credit balance of $80,000 in Allowance for Doubtful Accounts and a debit balance of $1,500,000 in Accounts Receivable. Information for 2021 is summarized below. Instructions a. Prepare the entries to record sales and collection during the period. b. Prepare the entry to record the write-off of uncollectible accounts during the period. c. Prepare the entries to record the recovery of uncollectible account during the period. d. Prepare the entry to record bad debt expense for the period