1×2= 2
2×2= 4
4×2= 8
8×2= 16
16×2= 32
32×2= 64
64×2= 128
128×2= 256
256×2= 512
512×2= 1,024
1,024×2= 2,048
2,048×2= 4,096
4,096×2= 8,192
8,192×2= 16,284
at the end of 2weeks he has saved $16,284 dollars
There's probably an easier way to do this but Idk how :p