Table 18-2
Given the Following Data $\begin{array}{lr}\text { Net sales } & \$ 100,000 \\\text { Cost of goods sold } & 50,000 \\\text { Gross margin } & \$ 50,000 \\\end{array}$

Table 18-2
Given the following data:
$\begin{array}{lr}\text { Net sales } & \$ 100,000 \\\text { Cost of goods sold } & 50,000 \\\text { Gross margin } & \$ 50,000 \\\end{array}$
-Refer to Table 18-2.If net sales increased 15%,and gross margin increased 10%,then cost of goods sold must have:

A) decreased 20.0%
B) increased 20.0%
C) decreased 12.5%
D) increased 12.5%