We know Eric has 4 stars and Chad has twice that amount, so Chad has 4 x 2 = 8 stars.
Then Chad sells 2 of them to Jeff, so Chad has 8 – 2 = <<8-2=6>>6 stars.
Altogether, Eric has 4 + Chad has 6 + Jeff has 6 = <<4+6+6=16>>16 stars.
#### 16