Density Farms Inc. had sales of $$750,000,$ cost of goods sold of $$200,000,$ selling and administrative expense of $$70,000,$ and operating profit of $$150,000.$ What was the value of amortization expense?

a$.$ $$330,000$

b$.$ $$0$

c$.$ $$230,000$

d$.$ $$150,000$