LotFP + http://tenfootpolemic.blogspot.com/2017/01/dm-shit-how-i-use-skills.html
Rations & Torches:
Rations: d4-d20, roll over 4, over 6 if animals. Can only have one of each, failing a roll means ration is gone. Cost 2x(dice size), so d4 costs 8gp, d20 costs 40gp. Each one takes 1 encumbrance
Torches d8, Candle d10, Lantern d20, roll over 4, missing target decreases die size by one.