The Following Data Relate to Swift Company for the Year

The following data relate to Swift Company for the year ended December 31, 2010.Swift Company uses the accrual basis.
Sales on credit
$250,000
Cost of inventory sold on credit
170,000
Collections from customers
220,000
Purchase of inventory on credit
150,000
Payment for purchases
140,000
Selling expenses (accrual basis)
40,000
Payment for selling expenses
45,000
Which of the following amounts represents income for Swift Company for the year ended December 31, 2010?

A) $60,000
B) $50,000
C) $40,000
D) $35,000
E) $30,000