Friction on a sled problem?

A father pulls his young daughter on a sled with a constant velocity on a level surface a distance of 10m , the rope in his hand is at a 30 degree angle from the sled (above in x axis). If the total m of the sled and the girl is 32 and the coefficient of kinetic friction between the sled runners and the snow is 0.25, how much work does the father do?