8. Your friend works as a software analyst and earns

$80,000 a year. She also has a part-time job of baking cookies for school and party events. She earns up to $500 per event and caters as many as five events a month.

She is wondering if she should switch to baking cookies full-time when she might be able to cater 25 events a month. Her operating expenses would be expected to rise by $10,000 per year. What is the opportunity cost for her if she switches to full-time catering? What recommendation would you make to your friend about her career, after weighing the pros and cons of each option? (2.1)