i want explanation step by step for this model mathematicaly

AutoSum- . Insert Delete Format 2 Clear Sort & Find & Filter Select Editing K L M N o network model - Microsoft Excel Home Insert Page Layout Formulas Data Review View % Cut Calibri - 12 === Wrap Text General 2 Copy Paste BIU Format Painter 3 Merge & Center 0822 Conditional Format Cell Formatting - as Table Styles Clipboard Font Alignment Number Styles H7 fe A B C D E F G H H 1 1 Network Transportation Problem 2 3 Cost per unit to deliver 4 Destination A Destination B Destination C Destination D 5 Origin A $ 1.10 S 1.60 $ 1.40 $ 1.20 6 Origin B $ 2.50 S 2.00 $ 2.60 $ 2.80 7 Origin C S 1.80 $ 2.10 $ 1.70 $ 1.90 8 9 10 Recommended Shipping Model 11 12 Destination A Destination B Destination Destination D Ship Capacity 13 Origin A 1600 o 0 2900 4500 To 19 Demand 4300 2000 2800 2900 12000 20 21 22 Total Cost $ 19,210 23 24 NH Sensitivity Report Model Sheet102 Ready 2 100% + 22-07