Show amount of discount on invoice

[clinicoffice_user]

Hi!

On the standard invoice it shows the costs and below the line the final costs. When there is a discount it only changes the total amount at the bottom, without showing the percentage of discount.

What line of code shows the amount of discount on the invoice, but leaves out the discount when there is none?

i.e:

price: 90
discount 50% 45
===============
total 45

[Author]

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