Suggestions?

4 Egg Sponge Cake - Recipe Cost

Ingredients	Per Serving Qty	Common Price	Price per Serving
4 large eggs, separated	3/8 eggs	$2.53 per 12 items	$0.08
1 teaspoon vanilla	0.1 teaspoon	$8.00 per 8 fluid ounces	$0.02
1/2 teaspoon salt	0.05 teaspoon	$2.91 per 16 ounces	$0.00
1 1/2 c. all-purpose flour	2 tablespoons	$2.99 per 5 pounds	$0.02
2 T cool water	0.2 teaspoon	n/a
1/2 c. warm water	2 3/8 teaspoons	n/a
1/2 teaspoon cream of tartar	0.05 teaspoon	$4.99 per 1 1/2 ounces	$0.02
1 1/2 c. sifted sugar	2 tablespoons	$1.44 per pound	$0.10
4 T butter	3/8 teaspoon	$3.99 per 16 ounces	$0.02
1 T orange rind	0.1 teaspoon	$3.00 per pound	$0.00
2 c. confectioners' sugar	3 tablespoons	$2.59 per 2 pounds	$0.07
4 to 6 T orange juice	1/2 teaspoon	$4.79 per 59 fluid ounces	$0.01
Total per Serving			$0.33
Total Recipe			$3.34