If
+
+
+
= 1160;
+
+
= 740 and
-
= 120,
then the value of
+
+
+
= __________ .
A780
B1020
C1180
D880
If
+
+
+
= 1160;
+
+
= 740 and
-
= 120,
then the value of
+
+
+
= __________ .
A780
B1020
C1180
D880