Monte Carlo Simulation Help

Hi everyone,

I'm having some trouble with running a Monte Carlo simulation. I'm at a complete loss on where I should go next. The situation is a variable supply and demand based on a randbetween function. However, the simulation is representing a business where if demand for services > supply of services, the excess demand for services is carried over to be completed if/when the supply is high enough to accommodate the additional work. I've worked on it for a few hours, trying different formulas but I can't seem to get anywhere. It's an assignment for a class, so I'm not looking to have you all do my homework for me, but just give me an idea or thought on where I should go next.

I've attached a spreadsheet of what I'm working on.