Mary has $500 in her account. she makes a $350 withdrawal, deposits $100, and then gets charged a $20 fee. how much does she have in her account?

Initial balance: $500

Post with-draw balance : Initial balance 500 - ammount taken (350) = 150

Balance after adding deposit: 150+100

Final balance = 250 - 20 (fee balance) = 230

The final balance is 230 dollars, assuming the fee is withdrawn from her accound