Good Day Please Assist Me With Answering The Following Question

Good day

Please assist me with answering the following question? 

If the average Mamelodi household (Average income = R3000 p.m.) spends 2% of their monthly income on milk, and the business- to- business market amounts to R80 000 per month, calculate the potential rand value of Ntombi’s Milk Market’s (NMM) market?