After 6 hours, we have the value of h = 6, so let's calculate the number sold of each bagel:
[tex]\begin{gathered} \text{asiago cheese:} \\ 12h+7=12\cdot6+7=72+7=79 \\ \text{plain:} \\ 7h-4=7\cdot6-4=42-4=38 \end{gathered}[/tex]
Now, calculating the value sold of each one:
[tex]\begin{gathered} \text{asiago cheese:} \\ 1.50\cdot79=118.5 \\ \text{plain:} \\ 1.50\cdot38=57 \end{gathered}[/tex]
Finally, calculating the difference, we have:
[tex]118.5-57=61.5[/tex]
So the difference is $61.50.
