The nation of Kona cultivates coffee beans and cassava, from which all their consumer goods are produced.

$($a$)$ Calculate the cost of the market basket of goods in the table in

$2010$

and in

$2015$

$$

$($b$)$ Use

$2010$

as the base year to calculate the price indices for

$2010$

and

$2015$

for the market basket of goods in the table. Show your work.

$($c$)$ In order for a citizen of Kona to maintain the same standard of living between

$2010$

and

$2015$

What percentage change in nominal income would be needed? Explain.