We know that he needs 48 oz of tomatoes.
Let be "x" the cost in dollars of 48 ounces of Brand A.
We know tha 8 ounces cost $2.99 in Brand A, so we can set up the following proportion:
[tex]\frac{2.99}{8}=\frac{x}{48}[/tex]Now we must solve for "x":
[tex]\begin{gathered} (48)(\frac{2.99}{8})=x \\ x=17.94 \end{gathered}[/tex]Let be "y" the cost in dollars of 48 ounces of Brand B.
We know that 16 ounces cost $4.99 in Brand B, so we can set up the following proportion:
[tex]\frac{4.99}{16}=\frac{y}{48}[/tex]Solving for "y", we get:
[tex]\begin{gathered} (48)(\frac{4.99}{16})=y \\ y=14.97 \end{gathered}[/tex]Therefore, as you can see, if he chooses Brand A,he'd pay $17.94 and if he chooses Brand B, he'd pay $14.97. So you can conclude that the better value is: Brand B.