please help me to solve this. Solver really confuses me.

File Home Insert Page Layout ua Pres_9_empty_Scher - Microsoft Excel Fornuis Data Review View Da Connections & Clear - Show Detail ? Solver Properties Reapply Hide Detal Data Analysis Fefresh 41 Sort Fiter Text to Remove Data Consolidate What if Group Ungroup Subtotal All Edt unk Links Advanced Com Duplicates Validation Analysis Connections Sort & Filter Data Toni Outiind Anales ET From From From From Other As wie Test SOURCE Get Estemal Data Existing Connections K12 f A B C D F F G H 1 1 1 M N 0 P Q R S T V w X Y 7 SunNet Flow From To 1 1 2 3 4 5 B 7 8 9 10 11 12 13 1 1 2 8 7 6 27 Cost SS 50 $7.50 $7.00 S8.00 S8.25 $7.25 $6.75 $775 $7.00 $7.50 $ $6.75 Node Net Flow Supply/Demand 1 230 2 -40 3 -25 4 -35 5 -33 6 60 7 70 R 40 3 6 37 3 8 4 7 4 8 5 7 5 8 - Total Cost 15 16 17 19 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 38 37 39 39 40 41 42 43 144 Ready Customer Assignments 110