My envelope contains:
A cardboard (approx. 30 grams; to prevent damage to photos)
A letter (approx. 30 grams; I designed it and all that so it's quite heavy)
My drawing
Two 3R pictures
SAE
Each IRC costs PHP115 (£1.67 / 2.65 USD), but I have no idea regarding its exchange value

Also, I'm considering sending a plain paper instead of the one I made because it's realllllly costly. >.< And maybe omitting the cardboard as well. >.< AHHH I've no idea at all. What do you guys think? I'm in desperate need of help.
