3 children rode the Ferris wheel at $5 reach for a total of 3*$5 = $<<3*5=15>>15
5 children rode the merry-go-round at $3 each for a total of 5*$3 = $<<5*3=15>>15
5 children bought 2 cones of ice cream each at $8 per cone for a total of 5*2*$8 = $<<5*2*8=80>>80
In total, they spent $15+$15+$80 = $<<15+15+80=110>>110
#### 110