The value of $$\left(\frac{2}{5} of 7\frac{1}{2} \div 2\frac{1}{4}\right) + \left(5\frac{1}{2} \div 3\frac{2}{3} of 6\right) - 1\frac{1}{3} \times \frac{5}{8}$$ is:

A

$$\frac{3}{2}$$

B

$$\frac{1}{4}$$

C

$$\frac{2}{3}$$

D

$$\frac{3}{4}$$