pizza and fish and chips which consumed more than 15 million pounds
Seperate the data presentation. Pizza was consumed ata different financial representation. Do not assume shared data. This error shows that the image values were not properly assessed. One item= one reference. Avoid merging information the avoid information errors.
47 million pound
The currency reference is missing an S at the end. This should be presented in plural form. The currency reference is correct in other sections.
On the other hand,
What happened to the one hand? When using this comparison reference, do it in partner references/phrases. Otherwise, it doesn't make sense to use the reference.
and they preferred eating fish and chips and hamburger to eating the pizza.
This should be an individual sentence as the food reference in for an unrelated disk
The writer has done a pretty good job at analysis presentation. More grammar and vocabulary lessons are needed since there are where most of the errors forus.