This is a partial adjusted trial balance of Carla Vista Co.. CARLA VISTA CO. Adjusted Trial Balance January 31, 2022 Credit Debit $900 1,200 $1,620 830 Supplies Prepaid Insurance Salaries and Wages Payable Unearned Service Revenue Supplies Expense Insurance Expense Salaries and Wages Expense Service Revenue 900 400 1,960 2,130 Answer these questions, assuming the year begins January 1. Answer these questions, assuming the year begins January 1. (a) If the amount in Supplies Expense is the January 31 adjusting entry and $380 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 1 year, what was the total premium and when was the policy purchased? Total premium for 1 year $ Purchase date (c) If $2,170 of salaries was paid in January, what was the balance in Salaries and Wages Payable at December 31, 2021? Balance in Salaries and Wages Payable at December 31, 2021 $ (d) If $1,800 was received in January for services performed in January, what was the balance in Unearned Service Revenue at December 31, 2021? Balance in Unearned Service Revenue at December 31, 2021 $