Though I do not think that we have the full question here, if we have 4 anything and the total cost is $4.80, we can solve for the unit rate.
What we do is we take the $4.80 and we divide it by the number of units (or anything) that we have - in this case it is 4.
[tex] \frac{4.80}{4}=1.20 [/tex]
So we know that the unit rate is $1.20.
