Making VLOOKUP formulas go wild [VLOOKUP Week]

Situation

Often we need our lookup formulas to go wild. Not in the sense of go-wild-and-chomp-a-few-kilo-bytes-of-data sense. But wild like wild cards. For eg. In the below data, we may not remember the full name of sales person, but we know that her name starts with jac. Now how do you get the sales amount for that person?

Read more to find how to solve this.