This paper proposes an optimal electricity framework for the operation of the electricity retailer in the liberalized market environment considering optimized electric vehicles charging model based on timeof-use rates. The proposed short-term framework is considered as a day-ahead market. The novel contribution of this paper is to provide a procedure that allows a retailer to decide optimally its mix of uses from multiple electricity sources considering uncertainty associated with electric vehicles fleet flexible demand. In order to maximize its electricity profit, the retailer should determine the amount of power that should be purchased from or sold to the pool, the amount of consumed power from bilateral and call-option contracts, the amount of interruptible loads, and scheduling of self-production facility owned by itself. A realistic case study is presented in order to show the efficient performance of the proposed framework.