$\backslash$table$[[,$Year $2,$Year $1],[$Net Sales,$3,175,2,500],[$Operating costs except depreciation and amortization,$1,610,1,495],[$Depreciation and amortization,$159,100],[$Total Operating Costs,$1,769,1,595],[$Operating Income $($or EBIT$),1,406,905],[$Less: Interest,$141,118],[$Earnings before taxes $($EBT$),1,265,787],[$Less: Taxes $(25\%),316,197],[$Net Income,$949,590]]$

Calculate the profitability ratios of Dernham Inc. in the following table. Convert all calculations to a percentage rounded to two decimal places.

$\backslash$table$[[$Ratio$,$Value,$],[,$Year $2,$Year $1],[$Operating margin,$44\mathrm{.}28\%$grad,$36\mathrm{.}20\%$