SKU not on product page or in shopping cart

Hello, I am new to Shopify…I have just started playing with the craft theme.

How do I get the SKU to show on the product page?

Also it does not show in the cart…I did not process a order yet…(I am nowhere ready

to do that yet.) I have around 3800 item I need to get moved in..

But when I get a order from a customer it needs to have the SKU’s listed

That is how we keep track of all the items we sell.

I looked a few other themes and I did not see any that show the SKU numbers

on the product page or in the cart..

Thanks for your time.

Mike