Think your big problem is its sweets. Most companies prohibit you sending food,liquids etc.
I've sent things all over the world and my advice to make it cheaper is to pack as small and tight as poss as the airlines charge by either actual weight or volumetric weight(Whichever is greatest.)
The sweet thing is an issue though, perhaps Royal Mail ?
You will probably need an invoice to go with the goods, you can find shipping invoice templates online