From the income statement data below, compute the operating profit margin:

$\backslash$table$[[$Sales$,10,000],[$Cost of goods sold,$6,000],[$Gross Profit,$4,000],[$Selling$,$ general, and administrative expenses,$2,500],[,1,500],[$Interest expense,$300],[$Earnings before tax,$1,200],[$Tax$,300],[$Net Income,$900]]$

$15\%$

$40\%$

$12\%$

$9\%$