The Company A has sales of $$4,500,000.$ It also has invested assets of $$2,000,000$ and operating expenses of $$3,600,000.$ The company has established a minimum rate of return of $7\%.$ What is Company A$\text{'}$s rate of return on investment?

a$.25\%$

b$.20\%$

c$.56\%$

d$.45\%$