Example 1 A city charges monthly gas fees according to the following rules: if the gas usage does not exceed 60 cubic meters, the fee is 0.80 yuan per cubic meter; if it exceeds 60 cubic meters, the excess part is charged at 1.20 yuan per cubic meter. It is known that a user's average gas fee in April was 0.88 yuan per cubic meter. Then, the gas fee the user should pay in April is ( ) yuan.
(A) 60
(B) 66
(C) 75
(I) 78
(1999, National Junior High School Mathematics Competition)
Solution: Since $0.88>0.80$, the user's gas consumption in April exceeds 60 cubic meters. If the consumption is $x$ cubic meters, then
$$
60 \times 0.80 + 1.20 \times (x - 60) = 0.88 x.
$$

Solving for $x$ gives $x = 75$.
Therefore, the gas fee for April for this household is $75 \times 0.88 = 66$ yuan. Hence, the correct choice is $(B)$.