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how to change the the discount pcerntage?

I need to know how you cnange the discount percentage from 15 pct to 50 pct on UNIWELL SX6750 03 type.
Please help
Rohan, July 2020
I found this programming manual. The 03 and the 05 should be close enough in programming for the percentage function

https://the-checkout-tech.com/manuals/cashregisters/Uniwell_SX-6600_SX-6700_SX-6750_and_F_type_05_programming_manual.html

Registerman, August 2020
link Click here to see other fixes for Uniwell.