How do i save several scores in several scripts?

Hey, im currently making a clicker game, where i need to save the "points", so when i turn off the game the "score" gets saved and when i turn it on again, i still have the same score and stuff bought in the shop. So i dont know how i could save all stuff like score, what i have bought, how many "points" i get per click and secound. Please help! Thanks I have several scripts, pointsPerClick, pointsPerSec, shopManager. So i need help with all those scripts!