How to modify the cart in Drupal (Basic cart)?

Question

Drupal

The Basic Cart module adds a cart. I need to refine it - recalculate the order amount depending on the number of goods. From which side to dig?

Answer 1

I think that it is necessary to correct it in the basic_cart.cart.incfunction basic_cart_get_total_price() file . There, in the cycle , the order amount is calculated, a couple of if and variables will solve the problem.
foreach ($cart as $nid => $node)