Dear experts.
1. Without changing other data, there are different prices when estimating standard cost in CK11N/CK40N; as an example, the same purchased material may be price A when I estimate it in CK11N, and price B when I estimate it in CK40N; at this time, if I continue to publish the standard cost, my standard price may be incorrect, and of course, A/B Price is from the material of certain prices; at present, our system inside the value of the logic is as follows:

2. There is also CK40N inside the successful estimation of the material, if the price has been updated, I repeat the implementation of the estimation, has been estimated that the completion of the CK40N does not carry out the update of the material price, which will increase my workload, I can only estimate through the re-CK40N, and, at the same time, I found that, even if I re-CK40N for the estimation, the price may still not be updated?
3. By the way, according to the above value logic, the same material, there are multiple suppliers, these suppliers already have purchase information records, and there has been a purchase order, then this value according to what to take the value of the specific? Is it the lowest price? Or the price of the earliest date?
Please help me in this situation, thank you!