500
A health food company makes its "Superfood Blend" from whey protein, which costs $9.50 per kilogram and powdered soy protein, which costs $23.50 per kilogram. The blend ends up costing $15.10 per kilogram. If the company has 230 kilograms of whey protein on hand, how many kilograms of the soy protein does it need in order to make the blend? (Round to the nearest tenth)
153.3 kilograms