Explanation:
In 1977, the cpi value is
[tex]60.600[/tex]
In 2017 the cpi value is
[tex]245.120[/tex]
To figure out the cost of the value in 2017, we will interpolate below
[tex]\begin{gathered} 60.600=245.120 \\ 6.99=x \\ cross\text{ multiply, we will have} \\ 60.6x=6.99\times245.120 \\ \frac{60.6x}{60.6}=\frac{1713.3888}{60.6} \\ x=28.27 \end{gathered}[/tex]
Hence,
The final answer is
[tex]\Rightarrow\text{ \$}28.27[/tex]
