Generally you’ll find that the msrp is going to be roughly 9xBOM (bill of materials). That leaves wholesale prices to be roughly 3xBOM so that there’s some profitability at that stage. This is at least a common heuristic that I use when designing hardware. It’s easy to say, oh, this chip is way better and it only costs 1 dollar more in quantity, but now your final price is $9 more and you may have priced youself out of the market. These numbers change depending on volume, and how many zeros the final price has. And of course demand will also inform final price, but they’re numbers that seem to hold in a lot of manufacturing going back the early 80’s.
As for the BOM cost, you’re right that for the board, the highest costs are probably the charge circuit followed by the processor. Battery probably costs the most, but don’t discount the cost of the mould for the plastic, it’s a high up front cost that needs to be replaced more frequently than you’d guess.
In the end, that $20 bike lamp probably costs the shop $7-10 to aquire. And any shop that doesn’t charge at least 2x their average cost for small items will tend to find their profitability eroded by fielding returns and other hassle customers.
As for the BOM cost, you’re right that for the board, the highest costs are probably the charge circuit followed by the processor. Battery probably costs the most, but don’t discount the cost of the mould for the plastic, it’s a high up front cost that needs to be replaced more frequently than you’d guess.
In the end, that $20 bike lamp probably costs the shop $7-10 to aquire. And any shop that doesn’t charge at least 2x their average cost for small items will tend to find their profitability eroded by fielding returns and other hassle customers.