A delicatessen delivers a gigantic sandwich for the members of a jury who have been unable to
reach a verdict. The sandwich of bread, meat and cheese costs 50, 60 per pound for the bread, $3 per
pound for the meat, and $1.50 per pound for the cheese. A pound of bread supplies 10g of prote
pound of meat supplies 50g of protein, and a pound of cheese supplies 40g of protein. If each member
of the jury eats a pound of sandwich, receives 30g of protein, and pays $1.50 ($18 total), how much
each ingredient went into the sandwich?