Please show proper calculation and use the suitable solution method. Will upvote!

I am not sure if this question is related to the question before it, but here it is

2. A new detergent fluid supplier Ali Sdn. Bhd. offers a lower purchasing cost at RM 400. However, the Ali Sdn. Bhd set a limit of 500 bottles per order. Assumed that the carrying cost is maintained, should the workshop accept the offer from Ali Sdn. Bhd? Justify your answer by providing appropriate calculation. 1. Cleaning Padu services provide office building cleaning service for government building around Malaysia. The cleaning services approximate to use 5000 bottles of detergent fluid in a year. The purchasing cost from supplier Abu Sdn. Bhd. is RM 500 per order, while the carrying cost is RM 10 per year. What is the optimum ordering quantity for the detergent fluid? How many orders should Cleaning Padu services made per year? Identify the best time between orders if the they operated 20 days per month. Determine the total annual cost