The weather last year

(1) If the days with the highest temperature of 30℃ ~ 35℃ are x days, the days with the highest daily temperature of 40℃ and above are 2x days.

Then 3+x+ 15+24+2x=60,

Solution: x=6,

∴2x= 12，

The maximum daily temperature is 30℃ ~ 35℃ for 6 days, and the maximum daily temperature is 40℃ or above for 12 days.

(2) As shown in the figure;

(3)1000× (5× 24+10×12) = 240,000 yuan.