4. (10 points) One day, School A bought 56 kilograms of fruit candy, at 8.06 yuan per kilogram. A few days later, School B also needed to buy the same 56 kilograms of fruit candy, but it happened to be during a promotion, with the price of fruit candy reduced by 0.56 yuan per kilogram, and an additional 5% of the same fruit candy was given for free with any purchase. How much less (in yuan) will School B spend compared to School A?
A. 20
B. 51.36
C. 31.36
D. 10.36
【Analysis】According to the problem, School A spends $56 \times 8.06=451.36$ (yuan); School B needs to buy sugar $56 \div(1+5 \%)$ $=\frac{160}{3}$ (kilograms), with a unit price of $8.06-0.56=7.5$ yuan, so School B spends $\frac{160}{3} \times 7.5=400$ (yuan); School B will spend 51.36 yuan less than School A.

【Solution】Solution: School A spends:
$$
56 \times 8.06=451.36 \text { (yuan); }
$$

School B spends:
$$
\begin{array}{l}
\frac{160}{3} \times(8.06-0.56), \\
=\frac{160}{3} \times 7.5, \\
=400 \text { (yuan); }
\end{array}
$$

School B will spend less than School A:
$$
451.36-400=51.36 \text { (yuan); }
$$

Answer: School B will spend 51.36 yuan less than School A.