The table shows the change in temperature each hour for four hours. Find the total change C in temperature.

Change in Temperature
1 A.M. - 2 A.M. −3°F
2 A.M. - 3 A.M. −2°F
3 A.M. - 4 A.M. −2°F
4 A.M. - 5 A.M. +4°F