A certain liquid leaks out of a container at the rate of k liters for every x hours.  If the liquid costs $6 per liter, what is the cost, in dollars, of the amount of the liquid that will leak out in y hours? ~$\frac{ky}{6x}$~ ~$\frac{6x}{ky}$~ ~$\frac{6k}{xy}$~ ~$\frac{6ky}{x}$~ ~$\frac{6xy}{k}\$~