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Flaw in solution of question 2 ?

There seems to be a flaw in the solution of question 2.
Reason: COGS are not considered

Currently, calculation says:
Revenue 1bn - 920m fixed costs = 80m profit = 8% margin

But If we know that the gross margin is 50%, only 50% of the revenue of 1bn is available to cover the fixed costs (gross profit), the other 50% (500m) are the COGS.
Therefore, the calculation would be:

Gross profit 500m - 920m fixed costs = -420m which would result in -42%

Please let me know your thoughts.

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Top answer
Ian
Coach
edited on Sep 15, 2023
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate

Hi there,

To be honest, there's a lot going on in your Q&A + the case which, admittedly, would take a fair amount of time to process (would do this for a candidate, but not a free Q&A tbh). 

Here is one thing I do see though: There's a lot of messiness around gross margin, profit, fixed costs, cogs, etc. 

Just double check your understanding of these accounting terms and what goes into what (as well as in relation to the case). Additionally, remember that this case is 3 stars so there are probably some issues :)

E.g.

on Sep 16, 2023
I did not say, that COGS do only include variable costs. I just said, that COGS are not considered in that case and in consequence the solution is not correct.
on Sep 17, 2023
#1 rated McKinsey Coach

Hi there!

Sharing with you an additional resource in case it helps - a collection of the most common terms that show up in interview (with definitions and equations):


Best,
Cristian

———————————————

Practicing for interviews? Check out my latest case based on a first-round MBB interview >>> SoyTechnologies  

edited on Oct 11, 2023

I had exactly the same issue, which Ian's answer does not address.

Total revenue = profit + fixed costs + variable costs

The solution suggests 1B revenue = 80M profit + 920M fixed costs, apparently ignoring the variable costs, which seems wrong given the high COGS.

If Anonymous and I are mistaken, I would appreciate a clearer explanation from anyone in the community. If it is in fact an error, then a strange move from PrepLounge to solicit subscriptions in order for them to point out mistakes in their content.

5
on Oct 11, 2023
It was me who wrote the first post, I don't know why my name is not displayed. Will contact you directly for clarification. Overall, I don't think Preplounge is to blame here, as there is no mandatory quality control here. However, I find it more remarkable that you also notice the flaw, while the other answers aim at solutions without really understanding the issue
on Oct 11, 2023
Thanks Jens!
on Nov 10, 2023
PrepLounge

Thank you for your question. We have reviewed and adjusted the case. We hope it is more clear now, and let us know if you have further feedback. Your PrepLounge team 

4
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