There are various ways to calculate a Living Wage . Consider that people need to earn enough to:
- pay rent for a home 
- buy fuel for cooking and soap for cleaning
- pay fees / fares to attend school and get to work
- buy clothes to keep them warm in the winter and cool in summer
- buy an amount of food which they need to stay healthy, i.e 2400 cal 
If you employ a Domestic Worker, following this link will help you calculate what a living wage for your employee(s) would be.
 Read more: http://www.southafrica.info/about/social/poverty-040414.htm#.VeRfk_l2Bng#ixzz3kOxacXyd
 If one took a house of 55m2 costing around R250,000, the minimum recommended as a more acceptable standard for South Africa’s social and cultural needs by the Council for Scientific and Industrial Research (1982), hen a housing based living wage would equate to +_R8,000 per month.
 http://www.numbeo.com/food-prices/country_result.jsp?country=South+Africa(assuming 31 days per month)1,811.30 R Milk (regular), (0.25 liter)3.00 R; Loaf of Fresh White Bread (150.00 g)3.33; Rice (white), (0.10 kg)1.68; Eggs (3.60)6.29; Local Cheese (0.10 kg)7.89; Chicken Breasts (Boneless, Skinless), (0.25 kg)14.47; Apples (0.35 kg)6.19; Oranges (0.35 kg)5.39; Tomato (0.25 kg)4.03; Potato (0.30 kg)3.93; Lettuce (0.20 head)2.22