Information about Papanicolou Corporation is as follows:

	2016	2017
Output (units)	45,000	47,000
Selling price per unit	$25	$25
Input quantities:
Materials (pounds)	2,500	2,500
Labor (hours)	1,500	1,525
Input prices:
Materials (per pound)	$5.00	$5.50
Labor (per hour)	$7.00	$7.50

What is the materials productivity ratio for 2016?

a. 16

b. 25

c. 18

d. 28