I, the Vending Machine, Was Picked up by an Elf Girl

Roger traveled through time, but turned into a vending machine, selling everything from Coke instant noodles to magic items at reasonable prices and without being bullied. The system said that selling goods would make you stronger. Roger said that he must have customers first, so an elf girl came and picked him up. He soon discovers that he can level up and wield magic, from magic missiles to meteor showers. As a result, a vending machine appeared in this world that was capable of taking on thousands of armies, competing with magicians, killing demons with one strike, and even buying Coke instant noodles from him. Roger said: Although it is a vending machine, it is good to be able to upgrade and become stronger, and it can also live with a beautiful elf. (This book is also called "That Time I Was Reincarnated as a Vending Machine")