I am playing some optimized combinations and a wheel of pairs from Robert Serotic’s Systems.
The combinations (16):
02 11 19 23 33 40…02 06 19 30 31 42…06 23 25 31 40 44…25 28 30 34 42 44
06 12 18 20 36 49…03 05 11 17 46 48…04 07 10 27 38 42…02 07 20 27 35 42
06 08 10 29 31 35…08 11 25 29 33 44…02 08 19 28 29 34…08 23 29 30 40 42
10 11 30 33 35 42…02 10 19 25 35 44…10 23 28 34 35 40…06 11 28 31 33 34
The final total cost is $16.
. Babar 
The combinations (16):
02 11 19 23 33 40…02 06 19 30 31 42…06 23 25 31 40 44…25 28 30 34 42 44
06 12 18 20 36 49…03 05 11 17 46 48…04 07 10 27 38 42…02 07 20 27 35 42
06 08 10 29 31 35…08 11 25 29 33 44…02 08 19 28 29 34…08 23 29 30 40 42
10 11 30 33 35 42…02 10 19 25 35 44…10 23 28 34 35 40…06 11 28 31 33 34
The final total cost is $16.
. Babar 