I need to do Monte carlo simulation in excel. I have a fixed concentration value(0.0006) and value of flux 24 with a range of 20-200. We are multiplying the concentration value with flux value to calculate the flow. So i need to know the error using uniform calculation. I saw the value for flow given is 0.0144+/-0.032 for the given concentration and flux value . I cannot redo this calculation. Please help me.