Ahairdresser combined three bottles of shampoo into one bottle. the first bottle had 4.8 ounces of shampoo, the second bottle had 5.4 ounces, and the third bottle had 6.6 ounces. the hairdresser used 2/5 6.72 of the shampoo from the new bottle when she washed her hair. how many ounces of shampoo did she use?

A hairdresser combined three bottles of shampoo into one bottle. The first bottle had 4.8 ounces of shampoo, the second bottle had 5.4 ounces, and the third bottle had 6.6 ounces. The hairdresser used 2/5 6.72 of the shampoo from the new bottle when she washed her hair. How many ounces of shampoo did she use?