Answer:
the cost of daycare expenses
Explanation:
Jennifer is an employed woman who was on maternity leave because she was pregnant. Before the baby was born Jennifer had expenses she paid as her salary. However, now that the baby is born, Jennifer will have to go back to work, but someone will have to stay with the child. The best option for Jennifer is to leave the child in a day care, however, the day care will be a cost that Jennifer did not have before, but which became necessary.
For this reason, we can say that the additional cost in Jennifer's budget will be the cost of day care expenses.