(let's) say ; let us say----> used to introduce a suggestion or possible example of something: [แปลแบบไทย ๆ.... "เอาเป็นว่า"]
Ex: Try and finish the work by, let's say, Friday.
Ex: Say/Let's say (= if we accept) (that) the journey takes three hours, you'll arrive at two o'clock.
Ex: I can let you have it for, well let's say £100.