John is working part-time in an office. He works 30 hours per week and earns $600 each week. He currently has $2,700 in a savings account. John needs to spend $3,780 on car repairs. He sets aside $492 a week for his usual expenses. If John uses his savings to help pay for the repairs, it will take at least weeks to pay for the repairs.
A) 24x+16y
B) 0.6x+0.4y
C) 0.4x+0.6y
D) 16x+24y