Lisette is the owner of a bakery that earns zero economic profit. Last year, her total revenue was $145,000, her rent was $12,000, her labor costs were $65,000, and her overhead expenses were $25,000. From this information, we know that her explicit costs were ________.
a. $80,000
b. $92,000
c. $102,000
d. $77,000
e. $53,000