good question but sadly i don't have any answer to that as ive invested quite alot actually as a whole so don't remember how much each item set me back as ive done payments for sound damping , components , amps , sub , wiring all together .. i just know about the actual total amount which i've paid which i can't be able to tell as it will be quite shocking for you lolz
but this is internet and i believe its not that hard to check prices of everything online mentioned on eBay , crutch field , sonic electronix websites for an idea goodluck (H)