Considering only the aggregate state income tax liability, how should Norris, who sells widgets from its domicile State A, deploy its sales force? The states that entail the taxpayers entire customer base use the following flat income tax rates.

State A 5%

State B 3

State C 6

State D 0

This is the complete question that was given and no background and as far as a country, I assume the US because that is where the class is? I agree the question is clear as mud.