Calculate the amount of potential energy that was initially stored in the spring. g= 9.8?

A wooden block with m 1.85 kg is placed against a compressed spring at the bottom of a slope inclined at an angle of 34.0 degrees (point A). When the spring is released, it projects the block up the incline. At point B, a distance of 6.95 m up the incline from A, the block is moving up the incline at a speed of 7.30 m/s and is no longer in contact with the spring. The coefficient of kinetic friction between the block and incline is mu_k = 0.550. The m of the spring is negligible.