A prepositional phrase, as the name itself suggests, has to do with prepositions. So it is a phrase which starts with a preposition, and includes one, or more words after it.
In this case, the prepositional phrase is of dried meat, vegetables, and flour. The phrase acts as an adjective - what kind of supplies? (Those) of dried meat...
Answer:
I would say it is meeting with potential clients to pitch new products because his main concern and job description is to sell to clients and be the representative for the companies sales production.
hopefully that helps!
