Payment exceeding 20000/-

Hi,

My client is wholesale dealer in red chilly. They purchase RED CHILLY from farmer on sale or return basis. when they make the payment the same is made in CASH and amount paid is excess of 20000/-.In this case does it gets covered under section 40A(3 ) and 20% are disallowed. I think payment made to farmers in excess of 20000/- are allowed. Could you please let me know the correct solution.