Coastal Corporation estimates its income, by calendar quarter, as follows for 2018:

1st 2nd 3rd 4th 2018

Quarter Quarter Quarter Quarter Total

Est. Income $30,000 $40,000 $35,000 $40,000 $150,000

Income tax rates applicable to CoastalCorporation:

From: $ 0 to $50,000 15%

From: $50,001 to $75,000 25%

Over: $75,000 35%

Required:

Determine Coatal Corporation’s estimated effective tax rate.