First thing is to either call them or visit them with your 'car' and ask them
how much and if that is for each pass or three...if they know what it is all about
they should have a 'package deal' allowing you to make three passes within 'one'
day or more
Then the min of three passes...as you might find that you need some adjustments
and/or move stuff around...to re-weight it again
{edit}...please post back the actual weights and what you had to do
if anything to re-adjust. Plus the GVWR, F/R GAWR, GCWR and the GVWR
of your trailer...along with the brochure tongue weight & 'dry' weight
That would be a good basis for others who will read this thread