Confectioners, a chain of candy stores, purchases its candy in bulk from its suppliers. For a recent shipment, the company paid $2400 and received 7800 pieces of candy that are allocated among three groups. Group 1 consists of 2320 pieces that are expected to sell for $0.15 each. Group 2 consists of 5140 pieces that are expected to sell for $0.28 each. Group 3 consists of 340 pieces that are expected to sell for $0.64 each. Using the relative sales value method, what is the cost per item in Group 1?