Reese had a sum of money in her savings account. The company she used to work with was not doing well which is why she lost her job. So she spent 20% of her savings in February, 40% of it in March, and $1500 in April. After these expenses, Reese still has $2900 in her savings account. How much did she originally have in her savings account? Let's think step by step and output the final answer within \boxed{}.
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