If a vendor charges p dollars each for

rugby shirts, then he expects to sell 2000 _ 100p shirts at
a tournament.

Question:

I am not sure what you are trying to ask but this sounds like algebra. And this questions seems incomplete. Please post any questions that are part of it.

p = unit price in dollar of a rugby shirt
2000-100p = number of unit that he expect to sell
R(p) = Total revenue

so my guess would be
(^ means place as exponent)

R(p) = p(2000-100p)
R(p) = 2000p - 100p^2

so example on how to use it
-let say the vendor charges 5 dollars each

R(5) = (2000x5)-((100)(5x5))
R(5) = 10000-2500
R(5) = 7500

To find the total revenue the vendor expects to make from selling rugby shirts at the tournament, you multiply the price per shirt (p dollars) by the number of shirts expected to be sold (2000 - 100p shirts).

The formula for calculating revenue is:

Revenue = Price per unit * Quantity

In this case, the price per unit is p dollars and the quantity is 2000 - 100p shirts.

So, the revenue (R) can be represented by:

R = p * (2000 - 100p)

To find the exact value of R, you need to simplify the expression and perform the calculations.