The photography department in a department store experienced the following revenue and expenses during September: 
The photography departmental gross profit is:
Definitions:
Supply Curve
A graphical representation showing the relationship between the price of a good and the amount of it that suppliers are willing to produce.
Actual Price
The price at which goods or services are sold in the market, as opposed to theoretical or listed prices.
Supply-Side Market Failure
A situation where the production of a good or service does not take into account the full cost of its impact, leading to overproduction or underproduction.
Transcontinental Railway
A railroad system that crosses an entire continent, connecting distant locations and facilitating transportation and trade.
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