Diana put down a security deposit of $500 when she rented her studio apartment two years ago. Her lease specified that she would get the deposit back when she moved out, minus the cost of repairing any damages to the apartment. When she moved out, the landlord found the following damages:

broken window: cost $40 to repair
broken knob on cabinet: cost $6 to repair
missing set of mini-blinds: cost $35 to replace

How much of her security deposit will Diana get back?