饼图显示了杰西卡（Jessica）在旅行中购买不同物品的花费。 杰西卡在旅行中购买不同物品的花费也可以用下面的条形统计图表示。其中购物花费的直条尚未画出。 杰西卡在购物上花了多少钱？

1. Determine the fraction of the total amount spent on Food from the pie chart.

The sector for Food has a right angle ($90^\circ$).
Fraction of total spent on Food = $\frac{90^\circ}{360^\circ} = \frac{1}{4}$

2. Find the total amount spent on the trip.

From the bar graph, the amount spent on Food is $\char36{}800$.
Since $\frac{1}{4}$ of the total is $\char36{}800$,
Total amount = $800 \times 4 = \char36{}3200$

3. Calculate the amount spent on Shopping.

From the bar graph, Hotel = $\char36{}500$ and Airfare = $\char36{}500$.
Total spent on Hotel, Airfare, and Food = $500 + 500 + 800 = \char36{}1800$.
Amount spent on Shopping = Total amount - (Hotel + Airfare + Food)
Amount spent on Shopping = $3200 - 1800 = \char36{}1400$