Sally goes to have her hair trimmed and agrees to pay $40 to the stylist. while there, sally decides that she would also like highlights. the stylist informs her that highlights will cost an additional $30. sally agrees to the price, gets the highlights, but refuses to pay the extra amount. what is the likely result in a dispute between sally and the stylist, and why? multiple choicethe stylist will win because she did additional work in exchange for the extra payment; therefore, sally's promise was supported by valid consideration. the stylist will win because she did additional work in exchange for the extra payment; therefore, a valid unilateral contract existed. the stylist will win unless sally can show that she had previously received both a trim and highlights for $40. if she can prove that she previously received both for $40, the “past expectations” rule applies. sally will win because the stylist had a preexisting duty to have her hair looking its finest. sally will win because there was no valid consideration given in exchange for the highlighting.