Answer and Explanation:
The computation is shown below:
1. The two important implicit costs that Jane has not included is shown below
a) Quit a job at IBM at which she earned $50,000 per year
b) Losing a interest of $5,000 ($50,000 × 10%)
Therefore,
Total Implicit costs= $50,000 +$5000
= $55000
2. The pure economic profit or loss is shown below:
As we know that
Economic profits= Total revenue - Total economic costs
where,
Total economic costs= implicit cost + explicit cost
The explicit cost is
= Fixed cost + Variable cost
= $50,000 + $280 × 1,000
= $50,000 + $280,000
= $330,000
And, the implicit cost is $55,000
So,
Total economic costs is
= $55000 + $330,000
= $385,000
Now economic profit is
= $400 × 1,000 - $385,000
= $400,000 - $385,000
= $15,000