Consultation about catalyst stream flow rate and price setting

a) Hello, if the catalyst needs to be added to the reactor (the actual amount added is large, the catalyst price is also high), but the actual consumption of the catalyst during process operation is very small, could I ask you how to set the flow rate and price of the catalyst stream for process simulation, TEA, LCA? For process simulation, TEA, LCA, is the flow rate of catalyst set according to the actual amount of the catalyst added (which is large) or according to the actual consumption of the catalyst (which is small)? For process simulation, TEA, LCA, is the price of catalyst set according to the actual amount of catalyst added or according to the actual consumption of catalyst?

b) In ```HP``` process code, ```makeup_TiO2_catalyst``` stream does not seem to set the flow rate (https://github.com/BioSTEAMDevelopmentGroup/Bioindustrial-Park/blob/master/biorefineries/HP/system_light_lle_vacuum_distillation.py#L435), so could I ask you how to get the flow rate of ```makeup_TiO2_catalyst``` stream?