一位面包师烤制一个蛋糕需要使用 800 克面粉和 150 克糖。面粉以每包 900 克售卖，每包价格为 $5。糖以每包 500 克售卖，每包价格为 $3。面包师想要烤制 10 个蛋糕。下列哪个饼图显示了面包师在原料上花费的金额？

1. Calculate the total amount of flour and sugar needed for 10 cakes.

Flour needed = $800 \text{ g} \times 10 = 8000 \text{ g}$
Sugar needed = $150 \text{ g} \times 10 = 1500 \text{ g}$

2. Determine the number of packets of flour and sugar required.

Packets of flour = $8000 \div 900 = 8 \text{ R } 800$. So, 9 packets are needed.
Packets of sugar = $1500 \div 500 = 3$. So, 3 packets are needed.

3. Calculate the total cost of flour and sugar.

Cost of flour = $9 \times \char36{}5 = \char36{}45$
Cost of sugar = $3 \times \char36{}3 = \char36{}9$

4. Find the proportion of money spent on sugar and flour to identify the correct pie chart.

Total cost = $\char36{}45 + \char36{}9 = \char36{}54$
Fraction spent on sugar = $\frac{9}{54} = \frac{1}{6}$
Fraction spent on flour = $\frac{45}{54} = \frac{5}{6}$
This corresponds to Option (2), where the sugar sector is approximately one-sixth of the circle.