This is where you enter the average rate you charge, per hour, for your labor. Most companies charge different rates for different crew types (e.g. $35/hr for a maintenance crew and $45/hr for an install crew)... so enter your average chargeout rate per hour.
To be clear: This is not the amount you pay your staff, or the amount for the whole crew for the hour - it's the rate you charge your customers, for your labor, per man, per hour.
If you do more maintenance work than install work - your average chargeout rate per hour should be closer to your maintenance hourly rate. If you do more install work than maintenance, your average chargeout rate should be closer to your install crews' hourly rate.