Question $1$: Jing is considering starting a new business selling organic groceries. It

would cost her $$350,000$ a year to rent store space and buy the groceries from a wholesaler,

and she would have to quit her current job and give up a $$70,000$ annual salary.

$($a$)$ What is Jing$$s opportunity cost of starting a business?

$($b$)$ If Jing can make an accounting profit of $$50,000$ a year selling the organic groceries,

should she start the business?