Tackle prices -
Typical, I would think around 40% or the RRP is profit for the retailer. What he does with that is up to him, he might want to discount 25% off the RRP in order to shift more. However, he takes the heaviest gamble in many respects, he stock the stuff on his shelves and if it doesn't shift he may have to chuck it into the sale at 50% off - hence losing money.
What the importer (NB not a manufacturer) makes is more difficult to calculate. Typically he can expect 15-20% of the RRP as his profit. He may get a great deal from manufacturer in China, Malaysia and could make 40% of the RRP for himself instead. He may then launch the product at a special price giving some of that through the retailer to the end user. Another way of sharing this bonus is the give product away, ie: buy 10 get 2 free, the retailer might then reduce his selling price accordingly.
On small items, hooks, lines, and floats etc., there could be more mark-up for the retailer, but then he has to stock one hell of a lot of items just to sell a few.
Whatever anyone pays, no-one (well, not many) gets rich out of fishing tackle any more.
Another example - I had heard of one importer being quoted in the far east for a reel to RRP at ?99. The price given was ?4.90 per unit delivered!
How can they even make quality reels at that price? Just look at the parts list that comes with a reel and think how much human time it takles to assemble it.