thanks again truly for the availability and for the patience, and then summarizing the tinj 100 would be a tinj 80 + (tinj 80 - tinj60) from the ori, -so if I understand correctly, the tinj 70 would tinj 60 (tinj 60 - tinj40) and to calculate them staggered is used, I believe on a "proportion" at this point, since we don't have the tinj for 70 or ****th e good-natured it may be fine as I thought to myself??