Physics I don't understand?

A 76.8kg sled accelerates down a 100m 32 degree snowy hill and then slides onto an ice rink at the bottom of the hill (kinetic friction = 0.0500, sled on snow; kinetic friction = 0.0120, sled on ice). The sled then hits a bin of eight curling stones (20kg) that are 15m from the hill. The collision is elastic and... show more A 76.8kg sled accelerates down a 100m 32 degree snowy hill and then slides onto an ice rink at the bottom of the hill (kinetic friction = 0.0500, sled on snow; kinetic friction = 0.0120, sled on ice). The sled then hits a bin of eight curling stones (20kg) that are 15m from the hill. The collision is elastic and the sled stops afterword. How far does the bin of curling stones travel (kinetic friction= 0.0120, bin on ice).