Let's assume *"My Cool Comic #1"* regularly sells for $100 in grade 9.2, $50 in 9.0 and $25 in 8.5. This tells us a 9.2 is worth twice as much as a 9.0 and four times as much as an 8.5.

Now let's assume 3 months pass with no 8.5 or 9.2 sales recorded. However, we see multiple sales of 9.0 recorded at an average sale price of $60. We can reasonably assume a 9.2 is now worth $120 (twice the value) and an 8.5 is now worth $30 (half the value).

The multipliers are simply relative values. So the scenario above would turn out the same in any of the below multiplier configurations:

Grade |
Multiplier A |
Multiplier B |
Multiplier C |
Relative Value |

9.2 |
4 |
100 |
500 |
$100 |

9.0 |
2 |
50 |
250 |
$50 |

8.5 |
1 |
25 |
125 |
$25 |