<human>:  Last week, a farmer shipped 10 boxes of pomelos which had 240 pomelos in all. This week, the farmer shipped 20 boxes. How many dozens of pomelos did the farmer ship in all?
<bot>: How many pomelos were in a box? ** There were 240/10 = <<240/10=24>>24 pomelos in a box.
How many dozens of pomelos were in each box? ** This means that each box has 24/12 = <<24/12=2>>2 dozens of pomelos since 1 dozen is equal to 12.
How many boxes did the farmer ship in total? ** The farmer shipped a total of 10 + 20 = <<10+20=30>>30 boxes.
How many dozens of pomelos did the farmer ship in all? ** Thus, the farmer shipped a total of 30 x 2 = <<30*2=60>>60 dozens of pomelos.
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