Monthly Cost Estimated monthly silver plan premium (without subsidy) $618
Estimated tax credit from the government $222
Your estimated monthly silver plan premium $396
If that income is correct she would even qualify for cost-sharing deductible reduction in my state.
It doesn’t say if she was married or not. If married is her husband employed. Too little info to extract what her premium would be on the PA exchange or on any other. Regardless. The premium is unchanged, only the people paying the premium change. Either her or her neighbors will pay.