Wolverine, Inc. began operations on January 1 of the current year with a $11,200 cash balance. 40% of sales are collected in the month of sale; 60% are collected in the month following sale. Similarly, 10% of purchases are paid in the month of purchase, and 90% are paid in the month following purchase. The following data apply to January and February:

	January	February
Sales	$ 27,000	$ 47,000
Purchases	26,000	32,000
Operating expenses	6,200	8,200

If operating expenses are paid in the month incurred and include monthly depreciation charges of $1,700, determine the change in Wolverine's cash balance during February.

a.) $200 increase.

b.) $1,900 increase.

c.) $7,400 increase.

d.) $9,100 increase.

e.) Some other amount.