A 40-kg box slides down an incline that is angled 30$^{\circ}$ above the horizontal. The box starts from rest at a height of 8 m, and the coefficient of kinetic friction is 0.2. What is the total work done on the box as it slides to the bottom of the incline? 
选项为:A:$$1109J$$  B:$$2091J$$  C:$$3200J$$  D:$$4390J$$  请回答其中一个选项.