7. Mangoes are sold at 5 for $4.00 and oranges are sold at 3 for $10.50. Mother bought 8 mangoen and 7 oranges. How much did she pay in all for the Items?

working

First calculate the individual cost for each item

Mangoes: $4 / 5 = .8$

Oranges: $10.5 / 3 = $3.5

Now multiple the individual cost by the amount of each item that was bought

Mangoes: 8 x .8 = $6.4

Oranges: 7 x 3.5 = $24.5

Total cost = $30.90

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