[Rover] Score Help (CQ & ARRL)

[Ev Tupis]

List members...
I'm attempting to create some modeling software.  My old brain is having a difficult time correctly interpreting current ARRL Rover scoring.  Help, please?  I need an example of how ARRL Rover category scores are calculated.

To set things up, the CQ rules include an example:
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Rovers: For each new grid locator visited, contacts and grid locators count as new. Final Rover score is the sum of contact points made from each grid locator times the sum of all grid locators worked from all grids visited.

Example 2. W9FS/R works stations as follows:
From EN52: 50 QSOs (50 × 1 = 50) and 25 GL’s (25 multipliers) on 50 MHz
From EN52: 40 QSOs (40 × 2 = 80) and 10 GL’s (10 multipliers) on 144 MHz

From EN51: 60 QSOs (60 × 1 = 60) and 30 GL’s (30 multipliers) on 50 MHz
From EN51: 20 QSOs (20 × 2 = 40) and 5 GL’s (5 multipliers) on 144 MHz

W9FS/R has 230 QSO points (50 + 80 + 60 + 40) × 70 multipliers (25 + 10 + 30 + 5) = 16,100 total points

The ARRL Rover-scoring methodology states the following:
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5.4. Rovers only: The final score consists of the total number of QSO points from all bands times the sum of unique multipliers (grid squares) worked per band (regardless of which grid square they were made in) plus one additional multiplier for every grid square from which they successfully completed a contact.

I wish an example was included, but it is not.

Question:
Using CQ's "example", how do things lay out (calculate) in the ARRL contest (I'm fixated on that "unique multipliers" phrase for some reason)?

Ev, W2EV