What is the average effect on invoice errors when we switch from small customer size to large customer size?

I need to have these questions answered for this excel chart.Questions: What is the average effect on invoice errors when weswitch from small customer size to large customer size?What is the average effect on invoice errors when weswitch from foreign customer location to domestic customer location?What is the average effect on invoice errors when weswitch from commodity product type to specialty product type?Attachments:regression_chart.xlsx