There are 186 ounces of this solution in the storage cabinet.
15 and 1/2 equals 15.5. If each dextrose bottle contains 15.5 ounces of liquid, we can find the total amount of liquid with multiplication.
Multiply the ounces per one bottle (15.5 oz) by the total number of bottles:
15.5 x 12 = 186
There are 186 ounces of this solution in the storage cabinet.