#17 Detailed Reports: Time per month per company

[pmaier]

Hello,
we use the ticket system to give support to other
companys that belong to our company
(mother-daughter-constellation).
We need a report, which displays the time per month per
company. It's like the "company statistics", but not
with number of tickets. We need a list of companys with
minutes or hours.minutes, so that we can see, how many
time we spent on support for that company (it's for the
cost accounting)
A "nice to have" feature maybe a listing like:
company - supporter - time and "sum of time per company"

Has anybody implemented such a statistic?

Yours sincerely

Pete