Simple word problem causes dispute A company purchases 200 VCR units at a price of \$220 each. For each order of 200, there is a fee of \$25 added as well. 
If the company sells each VCR unit at a price marked up 30 percent, what is the profit per unit?
-First dispute was that no one buys VCRs anymore. Agreed! Let's look past this point . . .
Some students solved by doing the following;
200 units costs \$220 each with a \$25 fee, so: 
200 * 220 + 25
44000 + 25
44025 
That's the cost. Now the revenue, a 30% mark up of the cost price, times the number of units, so: 
(1.3 * 220) * 200
286 * 200
57200 
That's the total revenue. The total profit is the difference: 
57200 - 44025
13175 
And divide by the number of units to get the profit per unit: 
13175 / 200 = \$65.88 per unit (rounded to nearest penny)
Others solved this way;
Calculate the cost per unit as 220.125 - Because of the \$25 fee added. So, \$44025 / 200 = 220.125
220.125 * 1.3 = \$286.1625
\$286.1625 - \$220.125 = \$66.0375
To nearest penny, I calculate a profit of \$66.04
What is the true profit per unit?

The word "added" implies the buyer (the company) pays the fee.
The confusion is with the word "a price (marked up)": is it a list (sticker, nominal) price or a real price that the company paid per unit.
The formula of a unit profit is:
$$\frac{\pi}{Q}=\frac{TR-TC}{Q}=\frac{P^*Q-(PQ+fee)}{Q}.$$
As long as it is agreed upon what the selling price $P^*$ is, calculating the top (numerator, profit) first and then dividing by $Q$ will be the same as dividing the terms by $Q$ first and then subtracting.
