Orange/yellow x copper = green/turquoise multi, cambodian pettern, yellow-copper multy, yellow/red-irid multi, If lucky gold, copper multi. It highly depends on their background - how strong of a metallic is your copper. Strong metallic should give you more metallic fry. Otherwise, most will be non metallic colors.
red/cambodian x copper = green/turquoise multi, cambodian, cambodian-irid multi, red multi, copper with lots of red on it. Red is dominant over copper because coppers actually has red pigments too - to give it that copper look. "silverish" copper has less to no reds on it thus should give you more copper multi than the "real" copper.