Assume Kupfer Company has the following reported amounts: Sales revenue

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. Compute the following:
(a) Net sales,
(b) Gross profit,
(c) Income from operations,
(d) Gross profit rate. (Round to one decimal place.)