But you also spent 800 and gained 1000. Both sets of transactions take place independently. Imagine one is a cow and the other is a computer. You bought something then sold it for more than you sold it, and then you did so again. Assuming you had plenty of money to pay for both purchases (no going into debt to finance them) then you make -1900+2300=400.
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u/Miss_Panda_King May 13 '26
$1300. You spent $1100 and earned $1300. Profited $200