Mallory has a 10-month-old baby. When she had her baby Mallory switched from a full-time position that paid $3,900 a month to a part-time position that pays $1,500 a month (in the same firm). She now decides to enroll at UNC-Pembroke as a part-time student. Every month, she spent $40 on gas for her commute from home to work and $600 on rent. She had also managed to put some money on her saving account. She calculated that to attend school she would have to withdraw some of the money and that she would give up $25 in monthly interest. Now that she is taking classes she quits her latest job and hires a nanny for $200 a month. While attending school, she will spend the same monthly amount on rent ($600) and gas ($40), but will now pay $70 a month for a parking permit. She also chooses a payment plan offered by UNC-P that lets her pay tuition and books as monthly installments of $250. What is Mallory's opportunity cost of attending school in the first month? The final answer is a $ amount.