Question

Need someone with AP Environmental knowledge or general science smarts
The question on my worksheet is, "Estimate what percent of the mass of food in your diet comes from the first and second trophic levels."


As food I put rice, shrimp, bread, and carrots
So I figured out that the third trophic level is shrimp
and everything else falls into the second trophic level.

Right?
So mass, percent, estimate, how????