I have an item description for an inventory of things in my company which includes the dimensions of the item and the overall square footage per case.

I need a formula to extract the square footage from the description of the item, which is always the first number from the right of the string.

As you will notice the description does not have a uniform unit for square feet and the number on the right may or may not have a decimal. I need the entire number including any decimal points

Can someone help me extract the number on the right?

Examples:

12x12 cinder block 1.0sqft
6x10 wooden dark brown 5.4s/f
7x7 brick red 10sf
8x8 sunrise brick 10 s.f.