IF A=.26 B=.57 AND C=.86 WHAT COMBO EQUALS 32.78

There must be more to this question. For example,

39*.26 + 2*.57 + 25*.86 = 32.78
46*.26 + 32*.57 + 3*.86 = 32.78
47*.26 + 24*.57 + 8*.86 = 32.78
48*.26 + 16*.57 + 13*.86 = 32.78
49*.26 + 8*.57 + 18*.86 = 32.78
57*.26 + 30*.57 + 1*.86 = 32.78

among other combinations.