Replace the screen material and spline (plastic tube that holds it in place), replace broken corners, attempt to straighten rails on window screens. Patio doors may be a little extra, depending on the age/type of door it is- I.e. an old fashioned wooden door would take more time than a newer one.
This listing is a rough estimate for four average sized screens or one door.
I can direct you to the supplies, or get them myself, but you have to pay for them.