Using the financial information from the case study and the information listed below,$$calculate the net margin:

$2006$sales:$$$$158,375$

$2007$sales increased by $24\mathrm{.}31\%$

$2088$sales increased by $6\mathrm{.}92\%$

a$.$

$16\mathrm{.}8\%$

b$.$

$17\mathrm{.}01\%$

c$.$

$\mathrm{.}023\%$

d$.$

$20\mathrm{.}3\%$