Is there an easy way to loop thru the array below and add the incremented total price indexes so the order_total_price index contains the correct sum. Any help would be greatly appreciated. array(5) { [0] => array(15) { ["order_date"] => string(8) "09-01-08" ["order_product_price_1"] => string(5) "10.00" ["order_product_price_2"] => string(5) "20.00" ["order_total_price"] => string(0) "" } [1] => array(19) { ["order_date"] => string(8) "09-01-08" ["order_product_price_1"] => string(5) "25.00" ["order_product_price_2"] => string(5) "15.00" ["order_total_price"] => string(0) "" } Like this. array(5) { [0] => array(15) { ["order_date"] => string(8) "09-01-08" ["order_product_price_1"] => string(5) "10.00" ["order_product_price_2"] => string(5) "20.00" ["order_total_price"] => string(0) "30.00" } [1] => array(19) { ["order_date"] => string(8) "09-01-08" ["order_product_price_1"] => string(5) "25.00" ["order_product_price_2"] => string(5) "15.00" ["order_total_price"] => string(0) "40.00" } Tom Shaw php.coder@xxxxxxxxx