Lisa is using the needs approach to determine how much life insurance to buy. Her cash needs are $30,000; her income needs are $140,000; and special needs are $100,000. She has the following assets: $20,000 in bank accounts, $30,000 in retirement plans, and $40,000 in investment accounts. She owns no individual life insurance. She is covered by a $50,000 group life insurance policy through her employer. Based on this information, how much additional life insurance should she purchase?