Display number of Variants available instead of number of products on collection pages. Please help!

Hi everyone! I am using the sense theme and currently on my collections pages it says “15 products” on the top right corner. What code can I change, and where, to get this to instead say “75 styles” listing the number of variants instead of the number of products available? And furthermore, is there an easy way to have it say the number of styles available below each product name? I really appreciate anyone’s assistance!