Question

Write a formula that will help her determine how much will it cost.
Let’s let
P = old price per stamp
T = total cost for stamps

Answer 1

Hello and Welcome to OpenStudy! :)

is there more information that goes along with this question that you could provide please?

Answer 2

Thanks & The price of stamps just increased by $0.03. Berth wants to send out 30 party invitations.

Answer 3

alright :)
so the format is usually
(Total Cost) = (price of each) times (how many)

Answer 4

thanks so much

Answer 5

remember that (price of each) in this case would be the old price plus the increased amount :)
I'm glad I could help ^_^