how should be created PO with 100 lines and with different prices per pcs with 30% payment in advance?
for services with 1 line and simple description we use milestones - for that line we add particular milestone with some %;
but what about for materials? 30% payment in advance concerns the total amount of the PO; it means 30% concerns each line of 100; so for each line should be added milestones?