Answer
Butter: $102.7\%$
Chicken: $102.3\%$
Eggs: $101.8\%$
Sugar: $104.0\%$
Work Step by Step
We will calculate the rate of inflation for each of the four items in the given table with $n=1990-1950=40$:
$$\begin{align*}
r_{butter}=\left(\dfrac{2.195}{0.7420}\right)^{1/40}-1\approx 1.02748\approx 102.7\%\\
r_{chicken}=\left(\dfrac{1.087}{0.4430}\right)^{1/40}-1\approx 1.02269\approx 102.3\%\\
r_{eggs}=\left(\dfrac{1.356}{0.6710}\right)^{1/40}-1\approx 1.017744\approx 101.8\%\\
r_{sugar}=\left(\dfrac{0.4560}{0.0936}\right)^{1/40}-1\approx 1.04038\approx 104.0\%.
\end{align*}$$
