what is the first step to performing marginal analysis 
though not required a first step to performing marginal analysis is often to consider the fixed and variable components of an activity if all costs are fixed there will be little to no marginal costs as expenses will not change as units produced changed on the other hand if all costs are variable there will be considerable expenses to factor in the same though less applicable can be said about the benefit received because benefit often varies from the units consumed it is hardly ever fixed however you can slowly advance to a full marginal analysis by considering how marginal benefit and cost change from one unit to the next 