Now our goal is to turn that $500 free play into, at least, $250 cash. Our cash balance should be $250 + $500 = $750 when we are done. The lines above represent money lines. You always have to use the free play on the dog and you are looking for a line that is at least +150 with the other team no greater than -200, this will insure you get at least a 50% return. Now you will not be able to do this at one book, you will have to have money in another book for this to work because you are just asking for trouble if you try this at one book.