v2.0.5

Fully encapsulated with installer to remove legacy files (corrected);
removed redundant lines;
placement of '-' sign before '$' sign to match ot_coupon.php; tidy code
The module follows the original concept and discounts or adds surcharge on the total price

paymentmodulefee v2.0.4

payment module fee for zc158a to 2.2.2 and PHP8.2 to PHP8.5
Fully encapsulated
Installer removes legacy files

payment_module_fee_or_discount_v2.0.3

allows fee <1 ; allows decimal in discount value

payment_module_fee_or_discount_v2.0.2a

Defined variable
Deleted redundant version files:
./includes/module_version/payment_module_fee.txt
./module_version/payment_module_fee.txt

v2.0.2

zc157d to zc158a PHP7.4 to PHP8.2
Includes Group discounts and credit coupons.
Version number displayed in Admin

payment_module_fee_or_discount_v2.0.1

Additional class variables