Instructions

PPU price – calculated Price per Unit (just an abbreviation to avoid writing it every time).
General settings – settings of the plugin. You will find it under WooCommerce -> Settings -> Products -> Price per Unit PRO
Product settings – settings of particular product. You will find it under Products -> All Products -> concerned product -> tab Price per Unit PRO
Shop page – product archive, page where all your products are normally displayed. Usual URL is //your_website/shop/ Example here.
Single product page – product detail. Page where the details about specific product are displayed. Example here.
Cart page – page with where products added to the cart are displayed. Usual URL is //your_website/cart/ Example here.