Odoo V18

I have a question from the : Odoo V18 rental documentation page:

On the Odoo V18 rental documentation page there is an "exercise" under "Price computing" sub-section. However the calculation shown is incorrect as the cheapest option for the customer is a 1-week plus 1-day rental which is $600, rather than the stated $750 amount. How is it that three times "3 days" is the cheapest option when clearly it is not?

Second question is : When previewing or printing a rental quotation the pricing calculation is not displayed - For example in the exercise shown in the documentation: Is there a way to have the 3x "3 days" printed for clarity to the customer as to how the price was derived?