Editing the text in a script or adding a premade script in the desired location ?

is there any way to add the text in a script from another script or adding a premade script by coding in another script, i hope u get what i mean, like if i made a table of different things and set their prices in the script, something like this

"Item1.Price = 10"

how can i change the 10 to 20 or 0 or any other value by coding in another script