Stuck on filing out the table, help filling it out with an equation step by step would really help!

A 0.50-kg red cart is moving rightward with a speed of 60 cm/s when it collides with a 1.00kg blue cart that is initially at rest. The two carts stick together and move to the right with a speed of 20 cm/s after the collision. Enter the momentum values of each individual cart and of the system of two carts before and after the collision. Also indicate the change in momentum of the carts and of the system. Enter values in kg-cm/s. Use appropriate +/- sign for the Momentum Change column. Before After Momentum Collision Collision Change Check Answer I!\" nun nil