<PRE><B>Question 1101088</B>
The meaning for 1 lolly bag is confusing.  Moving ahead anyhow,


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 15 kg of lolly bags costing $11.20 per kilogram
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Accounting for kilograms of lolly bags?
j for Jelly Fruit
c for Chocolate buttons
{{{j+c=15}}}


Accounting for the cost of the mixture
assuming 15 total kilograms at $11.20 per kilogram
{{{9j+12c=11.2*15}}}
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simplify
{{{3j+4c=5*11.2}}}


Solve this system:  {{{system(3j+4c=56,j+c=15)}}}


c=11 and j=4</PRE>