Johannes owns a vegetable shop, he sells cabbage for $2 per kilogram. If Johannes was able to earn $30 last Wednesday, $24 last Friday, and $42 today, how many kilograms of cabbage was he able to sell?
Johannes was able to sell $30 / $2 = <<30/2=15>>15 kilograms last Wednesday.
He was able to sell $24 / $2 = <<24/2=12>>12 kilograms last Friday.
And he was able to sell $42 / $2 = <<42/2=21>>21 kilograms today.
Therefore, Johannes was able to sell is 15 + 12 + 21 = <<48=48>>48 kilograms of cabbage.
#### 48