Need help with motor selection

Hey guys my senior design group is building a robot. I am trying to select the motors for the robot and have a question.

 

Our max weight is 35lbs

going to use 4 motors so our Tpermotor= 1.845 Nm (stall torque)

and we need an rpm of around 115-120

Can anyone suggest motors to use to give me a better idea of what to look for.

I am getting confused by some of the sites using rated torque and what not and am also a novice.

Any help is appreciated

Thanks in advance.

If you need more information please let me know.

Yes this was the calculation

Yes this was the calculation using our max parameters and moving up a slope with a friction coefficient of .3 . We are not going to need this much but want to over engineer at this point. I just lost in the huge selection of motors and not sure what works best for this application. 

Yes this was the calculation

Yes this was the calculation using our max parameters and moving up a slope with a friction coefficient of .3 . We are not going to need this much but want to over engineer at this point. I just lost in the huge selection of motors and not sure what works best for this application.