I replied that as far I knew, Soholaunch did not have a COD option pre-installed, and that there might be a plug-in available on the after-market....you will need to either immerse yourself in the Official Soho Forums to search for others previous solutions or on the net for a "developer/supplier" of a plug-in that may be available (not free, most likely).
As far as simply using the "Peso" symbol, again, you should figure out from the Forums how to add either a new set of characters to your cart, or possibly re-configure the defaulted language (it has been done, so it's up to you).
Use the Official resources to explore your potential solutions, and make the efforts to really take charge of your cart development. If you decide to turn to a professional authorized SohoPro, you'll find
www.TemplateZapper.com both capable and affordable.