Answer:
A. $800
B. $4,800
August 1, 2019
C.$3,300 
$1,500
Explanation:
(a) Calculation for what was the balance in Supplies on January 1
Balance in Supplies on January 1=$950 + $700 - $850
 Balance in Supplies on January 1=$800
(b) Calculation for what was the total premium and when was the policy purchased
Total premium=($400 x 12 months)	
 Total premium=	$4,800
Calculation for when was the policy purchased
Prepaid Insurance, 1/31	$2,400
Monthly premium	$400
Number of months remaining	6
($2,400/$400)
Hence, The Policy was purchase on August 1, 2019	
(c)	Salary and Wages Payable at Decemeber 31, 2019	$1,500
Cash Paid	$2,500
Salaries and wages payable, 1/31	$800
$3,300
Less: Salaries and wages expense	$1,800
Salaries and wages payable, 12/31/19	$1,500