This is a partial adjusted trial balance of Sandhill Co.. If the amount in Supplies Expense is the January 31 adjusting entry and $330 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 If $2,960 of salaries was paid in January, what was the balance in Salaries and Wages Payable at December 31, 2021? Balance in Salaries and Wages Payable at December 31, 2021$ (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