I feeeel you. The moment I heard the news, I was shocked because Casio 991Es is the only calculator I used in my five years in engineering school. Good thing Casio570Es saves everything. It has the same features of Casio 991Es but the 570 has no solar power. 💗
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luh, still it is heartbreaking 570 is time consuming. The memo also includes 1calculator policy no reserved calcu .