Lofthouse is a store for people who want to decorate their homes. Last year its net sales totalled $200,750. The value of the items it sold was $172,300. Taxes for the year ran $37,680. The only expenses that the operation has are (1) licenses for $900, (2) salaries to the owner and three part-time assistant for $49,500, (3) administrative expenses of $9,800, and (4) utilities at $3,800. Calculate the net profit margin for Lofthouse