A partial adjusted trial balance of Skysong Company at January 31, 2020, shows the following.

SKYSONG COMPANY

ADJUSTED TRIAL BALANCE

JANUARY 31, 2020

Debit

Credit

Supplies $850

Prepaid Insurance 3,300

Salaries and Wages Payable $950

Unearned Service Revenue 900

Supplies Expense 950

Insurance Expense 550

Salaries and Wages Expense 1,950

Service Revenue 2,150

Answer the following questions, assuming the year begins January 1.

(a)

If the amount in Supplies Expense is the January 31 adjusting entry, and $850of supplies was purchased in January, what was the balance in Supplies on January 1?

Beginning balance of supplies$