A partial adjusted trial balance of Oriole Company at January 31, 2020, shows the following. Credit ORIOLE COMPANY Adjusted Trial Balance January 31, 2020 Debit Supplies $ 900 Prepaid Insurance 3,000 Salaries and Wages Payable Unearned Service Revenue Supplies Expense 800 Insurance Expense 500 Salaries and Wages Expense 2.900 Service Revenue $ 800 750 2,900 Answer the following questions, assuming the year begins January 1. (a) If the amount in Supplies Expense is the January 31 adjusting entry and $1,200 of supplies was purchased in January, what was the balance in Supplies on January 1? Supplies balance (b) 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 and when was the policy purchased? Total premium $ Purchase date (c) If $3,900 of salaries was paid in January, what was the balance in Salaries and Wages Payable at December 31, 2019? Salaries and wages payable $