Need help with cutting sheet metal into multiple parts

Hi.

I've looked and can't find solution to increase efficiency. I'm still trying to remember everything I learned about Solidworks in school.  I'm essentially needing to take a flat piece of sheet metal that is roughly 28"x 117" and make it into separate parts. I thought about placing it on a wall, then doing an extruded cut to remove portions for door openings that I do not need while converting the remaining pieces into separate parts that will retain the original mates and ensure they show up in the BOM as individual parts. Below is a sketch showing what I'd like to achieve. Green line is the whole sheet and red is what I'd like to remove. Any help is appreciated. Thanks in advance!