Current Attempt in Progress Assume Kupfer Company has the following reported amounts: Sales revenue $510,000, Sales returns and allowances $15,000, Cost of goods sold $330,000, and Operating expenses $90,000. (a) Compute the net sales. Netsales $ (b) Compute the gross profit. Grossprofit $ (c) Compute the income from operations. Income from operations $ (d) Compute the gross profit rate. (Round answer to 1 decimal place, e.g 25.2\%) Gross profit rate \%