Formula equivalent of Goal Seek function. How to manipulate margins based on Pricing requirements?

[sonic99]

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I have a cost, two different sets of pricing and therefore two different margins. I have been able to work out the percent change required in order to achieve goal margins. However, my current method works only when I'm manipulating one of the two margins, not both. Also, another tricky thing is that when manipulating Margin B, I may need to maintain the current Price 2, the cost obviously cannot change, so the only changeable is Price 1. How would I go about achieving this? I've attempted to include my workings, if someone is able to assist me I would be forever grateful.

https://i.stack.imgur.com/hq4He.png
https://i.stack.imgur.com/lNnKn.png

 

[James006]

Hello,

In both instances ... goal seek works backwards ... starting from result back to the input ...

Sadly pictures do not help ...

Could you explain one single example ... with figures and cells ...