7.3.4 Managing trade creditors (accounts payable)
This is well explained in the final reading.
Text reading
Atrill, Mclaney, Harvey & Jenner, pages 424-426
The reading makes the point that trade credit is not really a 'free' source of finance, but has some real costs attached to it. List the costs mentioned.
Read the Chapter Summary in Atrill, pp426-427, and then check the beginning of the chapter to see that you have achieved the learning objectives.