Hi I am trying to figure out what costs are sunk costs?

Pippa's current annual salary (2% raise expected next year)

$68,000

Annual tuition and fees

14,000

Annual book and supply expense

3,000

Monthly living expenses in Mexico City

800

Monthly living expenses in Halifax

1,600

Monthly auto expenses in Mexico City

350

Monthly auto expenses in Halifax

350

Cost of two business suits purchased just prior to resigning

600

Moving expenses

5,500