How to count Sum

Question

 In my Project im using AASp.mvc with Angularjs 

Here im adding Columns into Table when columns added into table how it counts total Here im showing table columns

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ID      Name            Price            Quentity         Amount

1         Rice            10                     10               100

2         Dal               5                       10               50

3         Colgate      15                        1                15

4         Biscute        10                        1               10

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Total Items->4                                    Amount  175

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How to Write code for caluculatibg Amount & TotalItems  it should be Generate automatically means when user click on add then item add within the tab & calculte the amt