"Total Hours" is how long you have spent on the job, "Total"
is the total cost.
The Copy button function is only for "One Line
Item" Invoices. So if you want to charge your customer say
$35 an hour and you have several things that you charge like "Service
Charge" That would be a set price.
So this is what it is doing:
Lets add up all your columns and divide that by the
base price $35 This will give you a single value so you can copy and
paste that number to another Invoice and that would be the invoice
you would give your customer.
This invoice is not included with Job