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.

Areal estate agent is considering changing her cell phone plan. there are three plans to choose from, all of which involve a monthly service charge of $20. plan a has a cost of $.42 a minute for daytime calls and $.17 a minute for evening calls. plan b has a charge of $.52 a minute for daytime calls and $.15 a minute for evening calls. plan c has a flat rate of $80 with 275 minutes of calls allowed per month and a charge of $.38 per minute beyond that, day or evening. a. determine the total charge under each plan for this case: 150 minutes of day calls and 70 minutes of evening calls in a month. (do not round intermediate calculations. round your answer to 2 decimal places. omit the "$" sign in your response.)c. if the agent will use the service for daytime calls, over what range of call minutes will each plan be optimal? (round each answer to the nearest whole number. include the indifference point itself in each answer.)d. suppose that the agent expects both daytime and evening calls. at what point (i. e., percentage of total call minutes used for daytime calls) would she be indifferent between plans a and b?