Roberta's Hot Stuff Began Making Hot and Sour Soup in August

Roberta's Hot Stuff began making hot and sour soup in August, 2012. The soup sells for $2 for a large package. Variable production costs are $0.70 per package. Roberta's Hot Stuff incurs monthly fixed manufacturing overhead costs of $40,000 and fixed selling and administrative cost of $8,000. On August 31, 2012 ending inventory was 10,000 soup packages. Assume Roberta's Hot Stuff produced 400,000 soup packages in September. Roberta's Hot Stuff sold 406,000 of the soup packages in September.
-Calculate the September net income using variable costing.

A) $479,800
B) $479,200
C) $487,200
D) $527,800