<human>:  Eden, Mary and Iris gather sand to fill their sandbox. Eden carried 4 buckets of sand. Mary carried 3 more buckets of sand than Eden. Iris carried 1 less bucket of sand than Mary. If each bucket contains 2 pounds of sand, how many pounds of sand did they collect in total?
<bot>: How many buckets of sand did Mary carry? ** Mary carried 4 + 3 = <<4+3=7>>7 buckets of sand.
How many buckets of sand did Iris carry? ** Iris carried 7 – 1 = <<7-1=6>>6 buckets of sand.
How many buckets of sand did they carry in total? ** All together, they carried 4 + 7 + 6 = <<4+7+6=17>>17 buckets of sand.
How many pounds of sand did they collect in total? ** The sand weighed a total of 17 * 2 = <<17*2=34>>34 pounds.
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