please answer the 3 quistions correctly

Which of the following statement(s) is / are true about Detailed cost calculation? Select the correct option(s) and click submit. A) Performing Detailed cost calculations is a labour intensive activity in which the buyer needs to collect a lot of information from the supplier. B) Performing detailed cost calculations is a good approach for categories at high value and high risks. C) If the supplier does not allow the buyer to visit the production site, Detailed cost calculations cannot be performed because when performing Detailed cost calculations supplier specific information is required and shared as an open book. Which of the following statement(s) is / are true? Select the correct option(s) and click Submit. A) TCO is a financial calculated number that indicates the total lifetime cost. B) TCO analysis is a method defined to find the lowest. total lifetime cost. C) TCO is a value calculated to identify the raw material cost. Buyers realizing cost calculations, can: Select the correct option(s) and click Submit. A) Check if the agreed prices are fair. B) Engage suppliers in quality improvement programs. C) Improve the delivery performances of the involved suppliers. D) All of the above