This would wildly vary based on your market, the going rate for labor, if your market skews union or non-union, your relationship with your contractors, and the rates you're able to negotiate with your contractors.
I have a standard price I pay for just about every line item, based on about $40 per hour.
This is what I pay, for labor only:
Install new countertops, sink, faucet and cabinet knobs
Countertop - Granite: $100 per slab
Sink - $35 for install
Faucet $20 for install
Cabinet knob - $1.25 each
Bath #1 Install new vanity, faucet, mirror, light and toilet
Vanity - depends on size
Mirror - $20
Light - $15-20
Toilet - $40
Bath #2 Install new vanity, toilet, 2 faucets, 2 mirrors, and two lights
see above
Install 2 storm doors
never installed one
All new switches, outlets and plate covers (21 outlets 10 switches)