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Payment in challenge studies from an economics perspective

 

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Oct 202013913916
Nov 202047947689
Dec 202026425540
Jan 202117315922
Feb 2021747112
Mar 2021655721
Apr 2021494519
May 2021453711
Jun 2021464115
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Oct 2021504028
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Jan 202458586
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Mar 202430130157
Apr 2024737216
Total29652775661

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