well my dads funeral is on wednesday and i have been roped into doing lots of peoples flowers, i have to do

20 inch massed cushoin
3 ft massed cross
DAD massed arrangement
massed double open heart

i have to travel 200 miles with all this stuff so i have no margin for error, and its not like i can really use whats left in the shop as i wont be back till friday, and if i have too little stuff im screwed

the size of white double xant i usually get would take 10 bunches roughly to do a dad frame

but i have been sent the larger english one to bring the cost down a touch

i can only get 20 buches of this larger one, and the rest would have to be the one i usually have so my question is how much of each kind of white double would i need for each arrangement?
im usually quite good at knowing but my head is battered at the moment and im so stressed i cant think straight so any advice would be appreciated, i really dont want to get this wrong

thanks