Woofter Corporation manufactures and sells a single product. The company uses units as the measure of activity in its budgets and performance reports. During January, the company budgeted for 7,600 units, but its actual level of activity was 7,560 units. The company has provided the following data concerning the formulas used in its budgeting and its actual results for January:

Data used in budgeting	Fixed element per month	Variable element per unit
Revenue		$41.40
Direct labor	$0	$7.40
Direct materials	0	19.20
Manufacturing overhead	43,100	1.20
Selling & administrative expenses	29,600	0.20
Total expenses	$72,700	$28.00
Actual results for month
Revenue	$300,074
Direct labor	$55,234
Direct materials	$147,182
Manufacturing overhead	$50,712
Selling & administrative expenses	$30,622

The net operating income in the planning budget for January would be closest to:

a. $16,410

b. $16,238

c. $28,604

d. $29,140