sorry to be so dim, but could someone please give me a hand with an invoice.
The cost is changing mid month and i'm trying to get my head around it.
Yearly total was £2340 from 18th feb06 - 20th March06
I invoice on the 1st day of the month.
Yearly total as of 21st March will be £4680
but we have already invoiced for feb (on the 18thfeb) and invoiced for march (1st march)
so i need to amend 21st-31st march on the april invoice and add the april total, which i think will only be 10 months instead of 12, as 2 invoices have already been issued.
easy things confuse me, more complex things i fine with lol