$\begin{array}{l}\text{Here, }\\ \\ \Rightarrow \text{20.3\% of 530 + 16.8\% of 225 = ?}\\ \\ \text{It can be further simplified as}\\ \\ =\frac{20.3}{100}\times 530+\frac{16.8}{100}\times 225\\ \\ =20.3\times 5.3+16.8\times 225\\ \\ \text{= 107.59 + 37.8 = 145.39}\end{array}$

Hence, option B is correct.