Is the Flow Rate Across a Split Gas System Additive?

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In a split gas system with a 1/2" source hose at 60PSI feeding four 3/8" hoses limited to 30SCFH, the total expected flow rate across the flow sensor would be 120SCFH. The gas composition of 90% Argon and 10% CO2 can be treated as an Ideal Gas for calculations. The flow rate is additive, meaning the total flow from the four hoses equals the source flow, regardless of distribution. Understanding gas laws is crucial, but the fundamental principle remains that the combined outlet flows equal the input flow. This confirms that the flow measurement at the source should reflect the total output from the split hoses.
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If I have a 1/2" source hose with 60PSI and a Flow sensor then split to four 3/8" hoses with a flow rate limited to 30SCFH. Should I expect to have a 120SCFH flow rate across my flow sensor? The gas will be 90% Argon/10%CO2, but we could assume an Ideal Gas for this... Right? I understand Metallurgy, but don't remember my gas laws very well.
 
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In general, the sum of the flows in the the four outlet hoses will be the flow value shown at the source regardless of whether this flow is equally distributed across those four outlet hoses or not.
 

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