Mona is going to be out of town for two days and will not be needing her car during this time. Lisa.

Mona is going to be out of town for two days and will not be needing her car during this time. Lisa is visiting relatives and is interested in renting her car. The value to Lisa of having the car during this time is $50 per day. Mona figures that the total cost to her of letting Lisa use the car is $20, regardless of how many days Lisa uses it. On the evening before the first of these two days, Mona can send a message to Lisa, offering to rent the car to her for two days for a specified price. Lisa can either accept the offer or reject the offer and make a counteroffer. The only problem is that it takes a full day for a counteroffer to be made and accepted.