well lets say 80% of copies sold are with guitar ($80 avaraged) and 20% normal ($50 avaraged). you have x*0.8*80+x*0.2*50 = 64x+1x=65x=$115m -> x=1.7 Million. Don't know where they put that number out of their pocket. (your 100 million are actually 115 million, look here).
But I would guess they are talked about shipped not sold to customers. For that you have take down the prices a little but then you would have shipped.
2
well lets say 80% of copies sold are with guitar ($80 avaraged) and 20% normal ($50 avaraged). you have x*0.8*80+x*0.2*50 = 64x+1x=65x=$115m -> x=1.7 Million. Don't know where they put that number out of their pocket. (your 100 million are actually 115 million, look here).
But I would guess they are talked about shipped not sold to customers. For that you have take down the prices a little but then you would have shipped.