urgent help

Hi, my name is Michelle... my scheduled surgery is on the 29th of this month... now I'm supposed to start my pre op. liquid diet in 2 days... I didn't bought the protein shakes that my surgeon recommend our the multivitamin... because those are just to expensive!!! I'm so worried because I don't know if I can have other cheaper options... do you have any suggestions for me?

They are really not so expensive when you consider that's all you'll be eating.  I'm almost 3 months post-op and haven't calculated it out but I know I'm saving a ton of $$ on food in general, especially since I no longer stop at drive-thrus or eat out much. 

I used adkins LOW carb protien shakes! That is what my Dr wanted me to use!