One day, Barry the Barber, Inc., collects 400 dollar for haircuts. Over this day, his equipment depreciates in value by 50 dollar. Of the remaining 350 dollar, Barry sends 30 dollar to the government in sales taxes, takes home 220 dollar in wages, and retains 100 dollar in his business to add new equipment in the future. From the 220 dollar that Barry takes home, he pays 70 dollar in income taxes. Based on this information, compute Barry's contribution to the following measures of income.
a. gross domestic product
b. net national product
c. national income
d. personal income
e. disposable personal income