I did this back in 2011. I went to the USDA website and got the "Offficial USDA Food Plans: Cost of Food at Home at Four Levels, U.S. Average 2011."
It uses your age - gender group. There are 4 levels, and a weekly cost and monthly cost. You need to decide which level, age group you will use. (It is based on individuals in a 4-person family.) So you need to adjust. ( adjustments rates are on the bottom of the form) For example. a female in the 19-50 age group on the thrifty plan, weekly is $36.20 up to $71.89 on the liberal plan.
For 1 person family you would add 20%. So on the thrifty plan $36.20 *1.20 = $43.44, (new weekly rate x 52 weeks = $2258.88) That would be the average cost for a female in (19-50 age group) in a one person family for a year.
You will need actual receipts for a 2-week period so you can get a biweekly average. (I believe this is what the CFF recommends). So if your actual receipts for two weeks come to $200 x 26 = $5200 (your yearly cost)
Your cost of $5200-2259(Average cost) = 2941 that is the cost over the average person that you should be able to add to your medical expenses.
(This was back in 2011, you need to get the updated form) You will probably want to do this in a spreadsheet. And you might want to do 2 separate biweekly actual receipts averages to see if there is a huge difference. And if you eat out a lot, you probably should use one of the other plans beside the thrifty plan.
For electricity all the machines should have the voltage on the back of them. Your electric bill should have the rate they charge. Then decide how much you use them daily etc. From that you should be able to figure its cost.