Hi,
you have create a PO. in item service tab(for particular header item) you mention the maintenance charges ect...
then post the SES.
OR
enter the 2nd line item in header, for that u need post the 2 SES. 1 for main item 2. charges
for item services u mention all u need post the 1 SES
these both are possible.
or
put some amount on limits tab as unplanned and at the time of SES u directly enter the text and amount, (but reports not exactly shown the costs )
R
egards
Kumar