Answer:
23, 28, 33, 38, 43, 48, 53, 58
Explanation:
28, 33, 38, 43, 48, 53, 58, 63
Just add 5 every single time and you will get the answer. He earns 12 and spends 7 every week, so it is a net of 5. Add 5 every week.
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