Help replacing Pennco window balance

A friend from Nashville,TN says:
I need the same balance you guys did for Pennco windows in the below post(S770-34 with the bottom clip swapped out for your 62-105 hook) except I have one sash that weighs 21.6lbs and another that weighs 28.2lbs. I require one for each sash...Can you send me a Quote?
https://www.swisco.com/discussions/Replacement-parts-or-counter-balance-for-Pennco-windos-77-100865
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Tom from SWISCO responded:

Sure, it sounds like you need a 34B stamp for the 21.6 pound sash and a 34D stamp for the 28.2 pound sash. I'll email you an order link and price quote right now for one of each.

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