E2.7 (LO 3) (Analyze Adjusted Data) A partial adjusted trial balance of Piper Company at January 31, 2025, shows the following. Supplies Prepaid Insurance Piper Company Adjusted Trial Balance Salaries and Wages Payable Unearned Service Revenue Supplies Expense Insurance Expense Salaries and Wages Expense January 31, 2025 Debit Credit $ 700 2,400 $ 800 750 950 400 1,800 2,000 Instructions Service Revenue Answer the following questions, assuming the year begins January 1. a. If the amount in Supplies Expense is the January 31 adjusting entry, and $850 of supplies was pur- chased in January, what was the balance in Supplies on January 1? 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? Sc. c. If $2,500 of salaries was paid in January, what was the balance in Salaries and Wages Payable at December 31, 2024? d. If $1,600 was received in January for services performed in January, what was the balance in Unearned Service Revenue at December 31, 2024