Final answer:
The unit rate is $0.129 per ounce.
Step-by-step explanation:
The unit rate is the cost per ounce. To find the unit rate, divide the total cost by the number of ounces. In this case, the total cost is $6.19 and the number of ounces is 48. So, the unit rate is $6.19/48 = $0.129.