Marcia purchased a deferred variable annuity and selected two subaccounts, A and B, for the allocation of her $20,000 premium deposit. She directed $15,000 into Subaccount A and $5,000 into Subaccount B. At the time of her purchase, the value of a Subaccount A unit was $15, and the value of a Subaccount B unit was $10. How many total units did Marcia purchase?