Problem Solving

Under a certain company's medical insurance plan, the amount an employee must pay for medical expenses consists of payment of the first $450 of expenses plus 20% of additional expenses, up to a maximum total payment of $1,350 per year. All remaining expenses are paid by the plan. Last year, if an employee paid the maximum amount for medical expenses, what is the last amount that the plan could have paid?
(A) $720
(B) $1080
(C) $3600
(D) $4500
(E) $4950