FCN will have three contributions: 1) chi2 of F2 measurment from SLAC, BCDMS, NMC, H1 (only P): (F2model-F2data)**2/Error**2 2) chi2 of Normalization factors (Un-Ki explained why they are necessary) (nSLACp - 1.0)**2/0.02**2 + (nBCDMSp-1.0)/0.02**2 ... + aLambda**2 3) chi2 of Cross section from Photo-prod data <--- new contribution (0.112*F2_LO - Cross(data))**2/Error**2 (for proton) (0.112*F2_LO-2.0*dpho - Cross(data))**2/Error**2 (for deutron)