I download the orange book and with some filtering i come up with 19 companies so rather than dividing by 28 i should have used 19.
APOTEX INC NOSTRUM PHARMACEUTICALS LLC BARR LABORATORIES INC TEVA PHARMACEUTICALS USA INC ACTAVIS LABORATORIES FL INC ZYDUS PHARMACEUTICALS USA INC MYLAN PHARMACEUTICALS INC SUN PHARMACEUTICAL INDUSTRIES LTD CSPC OUYI PHARMACEUTICAL CO LTD AMNEAL PHARMACEUTICALS NY LLC AUROBINDO PHARMA LTD MARKSANS PHARMA LTD MACLEODS PHARMACEUTICALS LTD BEXIMCO PHARMACEUTICALS USA INC BRISTOL MYERS SQUIBB CO ACTAVIS ELIZABETH LLC IMPAX LABORATORIES INC RANBAXY LABORATORIES LTD TORRENT PHARMACEUTICALS LTD
updated numbers (600/19)x12.5%=3.9M so about 1M a QTR if off by 50% (they don't manufacture the drug) then $500k per QTR again the partner will make all the difference