Why is the cart price not displaying correctly?

[extravaganza]

Price in cart is totally missing:

Possible problems:

I've added currency converter, standard currency_form switcher, which didn't interact well with my tired pricing app (the app is adding the red lines). The app calculates the total price in bulk. (in that screenshot; 649.00 is the saving and 1249.00is retail price)

Somewhere in the calculations, the price got lost....

(Don't get distracted by the high numbers, it's a test)

[extravaganza]

How do I add the pricing back to the theme/cart?

Or how do I find the mistake?

Furthermore, the calculations are not correct. (ie. 100items*5,80=600,-) Can someone point me to the place where I can check and repair the issue?

The problem must be somewhere in the currency-calculations or in the bulk-calculations(most likely then, the app). ???