A trucking firm handles four commodities for a particular distributor. Total shipments for the commodities in 1994 and 2009, as well as the 1994 prices, are reported in the following table.

Develop a weighted aggregate quantity index with a 1994 base. Comment on the growth or decline in quantities over the 1994-2009 period.

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Shlpments 1994 120 86 35 60 Price/Shlpment 1994 $1200 $1800 $2000 $1500 Commodlty 2009 95 75 50 70