Need Ceremony & Centerpieces flowers

I am doing my wedding at windows on the lake... The florist is included in my package, but the prices i was given does not include flowers for the ceremony (which will take place outside on the lake across the street from windows on the lake) and centerpieces for the reception..... i am waiting till i meet with the windows staff to discuss adding these onto my package but i wanted to get some quotes so i have an idea or the price i should be looking for