A crate of fruit with a mass of 39.5 kg and a specific heat capacity of 3650 J/(kg K) slides 7.20 m down a ramp inclined at an angle of 39.2 degrees below the horizontal.

If the crate was at rest at the top of the incline and has a speed of 2.00 m/s at the bottom, how much work W-final was done on the crate by friction?
Use 9.81 m/s² for the acceleration due to gravity and express your answer in joules.