Variable Costing

Marsich Company has the following information for July:

Sales	$770,000
Variable cost of goods sold	369,600
Fixed manufacturing costs	130,900
Variable selling and administrative expenses	69,300
Fixed selling and administrative expenses	46,200

Determine the following for Marsich Company for the month of July:

a. Manufacturing margin	$fill in the blank 1
b. Contribution margin	$fill in the blank 2
c. Operating income	$fill in the blank 3