Answer:
£65.25
Explanation:
First you need to figure out how many packs of 8 she will need. you can do this with a quick division:
120 / 8 = 15
She will need 15 packs of 8 to cover the 120 children. The question says a pack costs £4.35 and we have 15, so now time for multiplication:
15 packs x £4.35 / pack = £65.25