Sara's Cake Company uses the following materials in its cakes: 1 cup flour 0.25 cups sugar 2 eggs 0.25 cups cocoa powder Here are the costs for each of the items: Flour: $0.50 per cup Sugar: $0.20 per cup Eggs: $0.25 per egg Cocoa: $0.80 per cup What is the standard materials cost of a single cake?

$2.25?

$1.25?

$1.05?

$1.00?