A baker used 800 g of flour and 150 g of sugar to bake a cake. Flour was sold in 900 g packets at $5 per packet. Sugar was sold in 500 g packets at $3 per packet. The baker wanted to bake 10 cakes. Which of the following pie chart shows the amount of money the baker spent on the ingredients?

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.