28oz $2.24
2.24/28 = .08
1.20/12 = .1
3.60/40 = .09
As you can see 2.24 for 28oz has the cheapest unit cost at .08 per oz.
If Yellow is x
Then purple is 3x-8
The total is 64, so x+3x-8=64
x=18
3*18-8=46
She can have 10 people attend.
The room costs $50 dollars, so she has $50 left to spend on food costs.
$50/5 = 10 people
