Within doing distributive property answering this question how would i be able to and can you explain it to me it has to be turnt in by tomorrow -4x - 4x

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

Can someone me with this? i’m not sure what to put for my equations.