The total amount Tanya spent on face moisturizers is 50*2 = $<<50*2=100>>100
If she bought four body lotions, the total cost is 4*60 = $<<4*60=240>>240
Tanya spent a total of 240+100 = $<<240+100=340>>340 in the store.
If Christy spent twice this amount, the total was 2*340 = $ 680
The total amount of money they both spent is 680+340 = <<680+340=1020>>1020$
#### 1020