Excel solver help

[excelnoob7]

i need help with using solver in the following situation

i need use solver to find the number of each fan that will maximize profit within the available labour hours

what is my set objective?
what are my constraints? of course the labour required has to be smaller or equal to labour available but anything else?
what are my changing variables?

what specifically do i enter into solver to fill in the information?

 

[shg]

Cross-posted at Using Solver in Excel