You mean a cupcake with a "polka dot" of contrasting cake inside? I've done heart shapes for Valentine's Day. Not exactly the same. I think I added on 50 cents each (maybe just a quarter) for the heart shapes. Or you mean a cupcake with a stick coming out of the top, which would be pretty weird. Since you couldn't bake a chocolate coated cake pop into a cupcake, you must be talking about the polka-dot thing. I'd probably add on 50 cents each, making my regular cupcake move from $3 each to $3.50 each.
I think you'd have to use a shorter stick, a denser cupcake and/or frosting, and maybe a smaller than normal cakepop. Mine are pretty top heavy - just over 1oz on a 6"stick - and if I tried to stick one in one of my cupcakes, it would probably fall over and rip through the cupcake. No pricing advice for you for your area - I charge €2.50 for a cupcake (frosting and sprinkles, no modelled deco) and €3 for a cakepop with just sprinkles. I would add the 2 prices together, and add a PITA fee and packaging fee.
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