Ecommerce & Marketplaces
Net profit per unit
Every cost of one flip subtracted from the sell price.
The Formula
Net = Sell - Buy - Sell x Fee - Ship in - Ship out - Other
Every cost of one flip subtracted from the sell price.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| S | Sell price | currency | Price the unit sells for. |
| B | Buy cost | currency | Cost to acquire the unit. |
| f | Fee rate | rate | Marketplace commission. |
| S_i | Shipping in | currency | Cost to acquire the item. |
| S_o | Shipping out | currency | Cost to send it to the buyer. |
| O | Other cost | currency | Cleaning, repair or packaging. |
What Each Symbol Means
Scurrency
Sell price
Price the unit sells for.
Bcurrency
Buy cost
Cost to acquire the unit.
frate
Fee rate
Marketplace commission.
S_icurrency
Shipping in
Cost to acquire the item.
S_ocurrency
Shipping out
Cost to send it to the buyer.
Ocurrency
Other cost
Cleaning, repair or packaging.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate reselling profit page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Reselling Profit, filed under Business. Every number the guide produces comes from substituting into this one line.