Twice as much as Cecil's money is $600 x 2 = $<<600*2=1200>>1200.
So, Catherine has $1200 - $250 = $<<1200-250=950>>950.
While Carmela has $1200 + $50 = $<<1200+50=1250>>1250.
Hence, they have a total of $600 + $950 + $1250 = $<<600+950+1250=2800>>2800.
#### 2800