The bank reconciliation as of December 31, 2020, includes the following facts. Cash balance per bank Cash balance per books Outstanding checks Deposit in transit Interest earned (on bank account) Bank service charges (miscellaneous expense)) $ 15,700 18,200 2,100 2,750 64 21 Reported on the bank statement is a canceled check that the company failed to record. (Information from the bank reconciliation allows you to determine the amount of this check, which is a payment on an account payable.) b. An examination of customers' accounts shows that accounts totaling $685 should be written off as uncollectible. Using an aging of receivables, the company determines that the ending balance of the Allowance for Doubtful Accounts should be $730. c. A truck is purchased and placed in service on January 1, 2020. Its cost is being depreciated with the straight-line method using the following facts and estimates. Original cost Expected salvage value. Useful life (years) $ 35,000 $ 10,400 d. Two items of equipment (a sprayer and an injector) were purchased and put into service in early January 2018. They are being depreciated with the straight-line method using these facts and estimates Original cost Expected salvage value Useful life (years) Sprayer $31,8001 $ 3,000 Injector 5 19,200 $3,100 5 e. On September 1, 2020, the company is paid $9,900 cash in advance to provide monthly service for an apartment complex for one year. The company began providing the services in September. When the cash was received, the full amount was credited to the Extermination Services Revenue account,