so you just need to buy some meatballs, of any sort, your choice.  I usually use turkey meatballs, but the ones for your party were the generic kirkland brand italian meatballs
for the sauce I use one can of hunts tomato sauce (i think 15oz can?) and have a container of ricotta cheese (usually 15oz container?) and then add about 20 meatballs.  so you can easily double that, 2 cans of tomato sauce and 1 container of ricotta, for about 40-50 meatballs, depends on how much sauce you want just heat up the tomato sauce, add the ricotta and let it sort of melt in by stirring, then add the frozen meatballs, simmer at least 20 min. (to make sure not frozen) and voila.  I also eat my meatballs with broccoli and maybe melt some cheddar cheese on top