Joanna is a 35-year-old woman living in sunny Arizona. After a long and stressful day at work, she hops in her car and blasts the A/C. Her car thermometer reads 108 F. On her way home she decides to stop by the self-serve food bar at the local supermarket. Her food options include meatloaf and mashed potatoes ($5), vegetable barley soup ($3), or a fresh Chinese chicken salad ($5). Her beverage choices include hot coffee ($2), bottled water ($1), or ice-cold lemonade ($1.50). She selects the salad and lemonade. As she is paying for her meal at the check-out counter, she spots a double chocolate brownie ($1) and decides to purchase that, too.

What factors could have influenced Joanna's choices for dinner?