Felipe vasquez bought some 14₵ stamps and the same number of 22₵ stamps. he paid a total of $1.80 for all the stamps. how many of each kind did he buy?

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !