On April 1, 2018, value added tax (VAT) for apps and in-app purchases in South Africa changed from 14% to 15%. Within the next week, proceeds for the App Store in South Africa will change to account for this tax. Prices on the App Store won’t change.
Once this change goes into effect, proceeds in the Pricing and Availability section of My Apps will be updated. You can download the updated price tier charts now.
https://itunespartner.apple.com/assets/downloads/AppsPricingSchedule_April2018.pdf