In the base game when a player hits a K-Cash symbol in the highlighted center row they accumulate that amount in the box above the reel. If they fill all five accumulator boxes, they win all the amounts shown, but maxed out even further with a random multiplier.
There is also the Cashlinez bonus. Hit three or more K-Cash symbols in the highlighted center row for three initial Cashlinez spins. Aim to cover as many positions on the reels as you can and unlock up to 10 patterns, each with their own win multiplier. Unlock multiple patterns to add the multipliers together for spectacular prizes.