30 points ivan is saving money to buy a computer with. he started wih $225 in his savings account and the first week he added $75, the second week he added $200, the third week he unfortunately had to take out $50 and the fourth week he added $125. how much more money does he need to save if the computer cost $895? show your work. a) $220 b) $320 c) $420 d) $575