When to Apply Minimum Area for High-Temp?

If I have multiple compounding remote area adjustments, when does the minimum remote area size for high-temperature sprinklers get applied?

For example, if there is a dry system protecting storage starting at 2,500 sqft, which calculation is correct?:

(a) 2,500 sqft x 0.75 (high-temperature reduction) = 1,875 ... rounded up to 2,000 sqft for minimum area, then 2,000 x 1.3 (dry system area increase) = 2,600 sqft.

or

(b) 2,500 sqft x 0.75 (high-temperature reduction) = 1,875 ... 1,875 x 1.3 (dry system area increase) = 2,437 sqft, which is greater than the 2,000 sqft high-temperature minimum.

Thanks in advance!

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