Prices for flowers

I need some advice. I went to a friend and these are the prices she quoted me for my flowers:
Bridesmaids Bouquets: $75/each (sahara roses)
My bouquet: $100 (sahara and ivory roses)
Boutenniers: $6/each
Corsages: $20-$25/each
Pew Bows: $10/each
Church baskets: $75/each
Centerpieces: $45/each

Please tell me what you think. Are these good prices. All of the flowers used are some type of rose...whether sahara or ivory or yellow.