Something like this. There are other parts calculating the requirements.

  | -1 | req. | 100 | 100 |  50 |               
  |  3 | milk | 2.92| 4.37|  3.5|
  |  # |      |-91.2|-86.8|-39.5|             
  #+TBLFM: @>$3..$5=(@<$1..@>>$1)*(@<..@>>)