Multiply values in each row in 2d array then calculate grand total

Question

If I have this array:

Array
(
    [0] => Array
      (
            [Price] => 18.00
            [Quantity] => 2
      )
    [1] => Array
      (
            [Price] => 21.00
            [Quantity] => 1
      )
)

How can I sum and multiply the value to get 57.00 ?

I can sum but not multiply:

echo array_sum(array_column($datas, 'Price'));

Answer 1

Use array_map() to multiply each price and quantity:

$total = array_sum(array_map(function($item) { 
    return $item['Price'] * $item['Quantity']; 
}, $datas));