When will Mr Blackman come? What is the recommended stock of coal?

F: When will Mr Blackman from GM come to our company?
M: Well, he planned to come on August 23, but he called yesterday telling he had to go to Spain on business with his boss. Now he’s planning to come next Friday, that’s August 31st.
F: I see.

M: Kathy, shall we go through the inventory then? Let’s start with coal.
F: We have about 45 tons. But we are supposed to have 70 tons.
M: So we’ve got too little. We’d better order some more. How about gas?
F: I think we have enough stock for that.
M: OK, thank you then.