Answer:
she could earn a total of $71,000 instead of attending graduate school.
Step-by-step explanation:
economic costs = accounting costs + opportunity costs
Jane's accounting costs = $100,000 in tuition + $20,000 room and board + $2,000 books
Jane's opportunity costs = unearned wages - $18,000 room and board (already included in accounting costs)
if Jane's economic cost = $175,000, then her unearned wages would equal:
$175,000 = $122,000 + unearned wages - $18,000
$175,000 = $104,000 + unearned wages
$71,000 = unearned wages