Earlier quoted context omitted.
Your units are wrong, kw not kwh. And your decimal place is wrong, the going rate is around $3 per watt. And I'm not sure how you were trying to relate that to battery storage.
I believe the person you responded to was talking about battery storage for solar set ups.
That would be one of these [https://www.amazon.com/LiFePO4-Battery-Perfect-Applications-...] for $3, if we were only talking batteries. No MPPT or line chargers, etc.
That’s about what the plastic and internal bus components are going to cost for that battery, with no actual battery internals.