Charlotte Corporation's management keeps track of the time it takes to process orders. During the most recent month, the following average times were recorded per order: Time spent between receipt of order and start of production 3.7 days Time spent ensuring quality levels 0.2 days Time spent working on the product 1.3 days Time spent transporting the product between work stations 0.8 days Time spent waiting to be worked on in the factory 6.9 days What is the throughput time? 2.3 days 9.2 days 6.0 days 12.9 days