Answer:
$5 is the value for dinner.
Step-by-step explanation:
Thomas has bought the movie ticket for $15. The movie ticket can be resell at a price of $10. His friend has asked him for free dinner but the dinner will cost him $5 since he will incur a loss of $5 on the movie ticket. The lowest value is the $5 for the dinner and the maximum value is $15 for the movie. Thomas can choose between two alternatives but will go towards the lowest value.