I had a formula for the calculation of fire load: combustible material in kg * calorific value/area in sq. meters for one flammable chemical in the work area we can calculate. However, in a chemical process area where a lot of chemicals are used, for instance, during the initial charging reaction time, 210 kg of solid material of flammable X and 60 kg of semi-solid flammable material Y are used. During centrifuge time, another 100 liters of solvent flammable is used. For different chemicals used at different times in the process area, how do we calculate the fire load?