wedding plan with cake (c) and champagne (h) - price per glass and slice
u(h,c) = h^(1/3)c
a) solve foc's to derive the demand functions h(P(subscript h), P(subscript c), M) and c(P(subscript h), P(subscript c), M)
b) suppose the budget constraint is 4c + 2h = 1200 what is optimal bundle