Bill and Ted enter into a forward contract with a forward price of F$.$ Bill takes the long position and Ted takes the short position. If the spot price at expiration is X$,$ then Ted's profit is $$10.$ If the spot price at expiration is $2$X$,$ then Bill's profit is $$20.$ Who makes a profit and how much profit do they make if the spot price at expiration is $1\mathrm{.}5$X$?$