Exercise 3-7 A partial adjusted trial balance of Swifty Company at January 31, 2017, shows the following. SWIFTY COMPANY ADJUSTED TRIAL BALANCE JANUARY 31, 2017 Debit Credit Supplies $940 Prepaid Insurance 3,840 Salaries and Wages Payable $1,040 Unearned Service Revenue 990 Supplies Expense 950 Insurance Expense 640 Salaries and Wages Expense 2,040 Service Revenue 2,240 Answer the following questions, assuming the year begins January 1. If the amount in Supplies Expense is the January 31 adjusting entry, and $850 of supplies was purchased in January, what was the balance in Supplies on January 1? Beginning balance of supplies $ Link to Text If the amount in Insurance Expense is the January 31 adjusting entry, and the original insurance premium was for one year, what was the total premium? Total premium $ When was the policy purchased? The policy was purchased on . Link to Text If $2,740 of salaries was paid in January, what was the balance in Salaries and Wages Payable at December 31, 2016? Beginning balance of salaries and wages payable $ Link to Text If $1,840 was received in January for services performed in January, what was the balance in Unearned Service Revenue at December 31, 2016? Assume that there are no accounts receivable. Beginning balance of unearned service revenue $