SOUTH AFRICA’S producer inflation, which represents domestic output, slowed to 7.2 percent year-on-year in March from 8.3 percent in February, Statistics South Africa said on Thursday.On a month-on-month basis, prices fell by 0.1 percent in March from a 0.9 percent increase previously.Economists polled by Reuters expected PPI to slow to 7.95 percent year-on-year and 0.6 percent on a monthly basis.