new variable Dispay Custom value in Cart Detail Row

[Massimo]

Hi,
i've override this Cart.php function "applyProductCalculations"  to have two new variable:
row["total_reduction"]: the sum of reduction on row.
row["total_wr"]: Total of row without reduction.

But... if i call my variable in "cart-detailed-product-line.tpl" this display nothing.

(p.s. in var_dump $product i find this variable)

How can solve this?

Here an Example:

Edited October 23, 2020 by Massimo (see edit history)