gross profit margin & profit margin for each year

\begin{tabular}{lrrr|} & 2019 & 2018 & 2017 \\ Sales & $39,431 & $40,827 & $36,588 \\ Cost of goods sold & 34,022 & 35,055 & 30,895 \\ Profit for the year & 1,765 & 2,296 & 2,196 \\ Current assets & 10,745 & 11,834 & 11,200 \\ Current liabilities & 8,529 & 10,304 & 9,243 \end{tabular}