JDE9.2 Billing Markup Using SWM Module

We use JDE9.2 SWM module to manage contracts. How can we bill the customer but code the markup to a different object account. For example, labour cost is at $80/hour, markup is at $40/hour. So the billing rate to the customer on labour is $120/hour. When we produce the invoice, how can we code the $80 to one object account and the $40 to another object account?

Thanks

Jessie