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29-06-2019
Mathematics

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Abinatamang Abinatamang

29-06-2019

Answer:

Original cost = $16.40

Tax=9℅

Tip=20℅

Total cost is,

=16.40+ 16.40×9℅+ 16.40×20℅

=16.40 +16.40×9 /100+16.40×20 /100

= 16.40+1.476+3.28

=$21.156

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