The total percentage of money that Reese spent in February and March is 20% + 40% = 60%.
This means the April expenses and the money left in her account make up 100% - 60% = 40% of her savings.
Reese had $2900 + $1500 = $<<2900+1500=4400>>4400 for the April expenses and the money left in her account.
So, $4400 is equal to 40% which means every 1% is equal to $4400/40 = $<<4400/40=110>>110.
Therefore, Reese originally had $110 x 100 = $<<110*100=11000>>11000 in her savings account.
#### 11000