User talk:23.235.31.237

January 2021
Hello, I'm Nieuwsgierige Gebruiker. I wanted to let you know that one or more of your recent contributions&#32;to Opportunity cost have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Teahouse. Thanks. Nieuwsgierige Gebruiker 14:28, 4 January 2021 (UTC)