How to make PO amount base for service item with different charge account,not qty base?

Hi Gurus,
We are working on bank head-office.I want to book service item(maintenance) in PO and this item should be distribute to different charge account against one PO line.How we can achieve this?

For example

Maintnance(service item) and quantity one.

Charge account                                                       AMOUNT
100-2000-1000(i.e 100branch balancing segment)  100
101-2000-1000(i.e 100branch balancing segment)   200
102-2000-1000(i.e 100branch balancing segment)   300
103-2000-1000(i.e 100branch balancing segment)   400
104-2000-1000(i.e 100branch balancing segment)   500
105-2000-1000(i.e 100branch balancing segment)   500
106-2000-1000(i.e 100branch balancing segment)   100