Linda needs help to determine whether her mother Kathleen meets the support test. Kathleen's sources of support include $3,500 from Social Security and $600 in interest income for a total of $4,100.

To determine whether Kathleen meets the support test, do the calculations on the next series of screens based on the information in the table. You may want to have a calculator handy for this activity.

How much did Linda contribute toward her mother's support? $ (Please do not use commas in answer)