Write a report for a university lecturer describing the information below.

The bar chart compares expenditure by three income groups on three types of fast food in the UK in 1990. Overall, while all three income groups bought fast foods, there were differences in the type of fast food eaten by each group. It is also clear that the low income group spent the lowest amount. People in the high income group spent the most money. They spent about 42 pence per week on hamburgers, and 17 and 19 pence per week on fish and chips and pizza respectively. In the average income group, consumers also spent more on hamburgers than on the other fast foods. Their spending on burgers was 33 pence per week, although fish and chips came a close second at 25 pence. The lowest expenditure was just 12 pence on pizza. People spent more on fish and chips than on burgers and pizza in the low income group. However, spending was relatively low, at just 17 pence per week on fish and chips, 14 pence on hamburgers and only 7 pence on pizza.