$($This question is a written response, no numeric calculations are involved$)$

You are on a project that needs to develop a CER for the retirement cost of your project under development: A small refrigerator. The problem is that the development project has not yet started, so there is not a precise estimate of the refrigerator's size $($capacity$)$ and mass. Still, you do know that it will have a refrigeration and freezer compartments, and roughly $15\%$ of the mass will be plastic, $5\%$ fiberglass $($non$-$recyclable$)$ insulation, a cooling fluid $($i$.$e$.,$ R$-134$a or similar$),$ with the rest being recyclable metal. Federal regulations are mandating that any new refrigerators sold and used in the USA must be reclaimed and retired by the manufacturer at the end of the product's life. I.e$.,$ that retirement cost begins when the consumer $($user$)$ calls up your company in the future and tells the company to pick up the old fridge.

a$.$ Identify $($in words$)$ two distinct $(2)$ cost components that sum to the total refrigerator retirement cost for your company.

b$.$ Define $2$ independent variables each that would be used to calculate these two cost components. You don't need to identify range of values, only define what the variables are.

c$.$ Describe briefly how you would create a CER using at least two of your independent variables $($likely$,$ the ones noted in part b$).$ A stab at an equation would be best, but some math aspect may be the best you can do $($i$.$e$,"...$a sum of my X and Y variables, during the life cycle, multiplied by a factor to include cost $....").$

Summary:

a$.$ Need two cost components defined

b$.$ Need four $(2$ each$)$ variables that are used in the cost components noted previously.

c$.$ Describe for at least $2$ of the $4$ variables previously how you estimated the variable values.