First, I assume that cost of those products are zero

This question does not look like it has a short cut. However, was this questions multiple choice?

If this was the case, then you can follow different methodology like estimating the potential difference range by checking answers.

Cheers

Serhat

Hi,

Several things:

1. In the multiple answer questions, you should use the process of elimination
2. If the average time per question is 80 sec, this means that some questions can take more than 80 and some questions will take less. You should just control the overall timing

Best

Hi Eugene,

There's a convoluted way, if you set one of the three persons as a baseline and calculate the difference with the 2 others (that way you only calculate the revenue for 2 persons, and with smaller numbers).

A. B
JAMES . 15 16

SALLY 25 . 10

ANDREW 18 13

Since Sally has the highest number, let's take here as a baseline, your table then becomes:

A . B

JAMES . -10 . +6

SALLY . 0 . 0 .

ANDREW . -7 . +3

So the difference between James and Sally is -10*35.75 + 6*42.25 ~= -360 + 240 ~= -120

and the difference between Andrew and Sally is -7*35.75 + 3*42.25 ~= -250 +120 ~= -130

So then you calculate the exact difference between Andrew and Saly and find 123.50 (absolute value)

Sorry, from this question you don't need to make any calculations since it can not be answered. As long as we don't get information on the costs or profit per product, the question as it was posed can not be answered. Regardless of the selling price, each product can have vastly different profitability.

Not sure whether you paraphrased the question incompletely or whether it was posed in such a poor way.

Cheers, Sidi

By looking on the numbers, without making large multiplications, you can see that the sales from Sally > James > Andrew. (E.g., product B is more expensive than A, while James and Andrew have the same number of products, but James has more of product B, etc.).

So your first step is to discard James from calculations.

Second step is to write the equation:

Sally – Andrew = 35.75*25 + 42.25*10 – (35.75*18 + 42.25*13) = 35.75*7 - 42.25*3 = 123.5. This would cut your operations maybe by 30-50%.