The roof time on the regular cab is 18.5 plus .8 for each side air bag. I don't know why that's not included being they all have side air bags, oh well. The 18.5 does include to R&I all the headliner, trim, and windows.
If it's a crew cab, it's 22.2 with sunroof and side rails, 21.6 with sunroof without side rails.
Without a sunroof and with side rails it's 21.0 without sunroof and without side rails it's 20.4
But realistically you need to paint both side roof rails and blend both cab corners (1.6 and 1.0 each) so that means the bed comes off (2.5)
I would likely find a bunch more little things like the vents on the back of the cab if it has them and a zillion other .2 little goodies that add up.
But there you go.