Everything that sold in Dawson had to be transported in from Seattle by sea-going vessel, through Five Finger Rapids, across the turbulent Lake Bennett, then down 300+ miles to Dawson.
This 1897 list of goods for sale reflects the cost of items.
If a miner bought these items in Seattle before leaving, then to the cost of the goods, a miner would have to figure the added cost of portage; a sizeable investment.
Portage, shipping and handling to modern readers, would include delivering the goods to the outgoing vessel. If some miners thought it better to move their kit themselves, they soon discovered that this was not always the most beneficial decision.