Tuna and Avocado Sandwich

What’s on the plate

Ingredient	Amount	Purine
Tuna, canned	100 g	142 mg
Bread, white	60 g	7.3 mg
Avocado, raw	50 g	9.2 mg

Each row = the food’s purine value per 100 g × the grams above ÷ 100, rounded to one decimal. The plate total is the sum of the rows. Missing values stay missing — they are never treated as zero (the one exception is a source record marked “below detection limit”).

How to assemble it

1. Drain the tuna and spread it on one slice of bread.
2. Mash the avocado and spread it on the other slice.
3. Close the sandwich and cut it in half.