Father buying from son who is a rep
Q: My father is the buyer in the shop
3 reps come:
Rep A offers R 2.00
Rep B offers R3.00
Rep C offers R3.50
Can my father accepts rep A offer although it is his son. In the shop my parents told me 90- 98 % of the time they do not send people to go and buy. They get their goods from reps who deliver. So by selling to them I am the cheapest rep (where I buy from is cheaper, they know of this place, but they do not buy in that manner 90-98% of the time). So now what I am doing is it permissible?