Moulding Miscue

So I foolishly didn't buy enough of the 3 1/2" primed crown moulding from Peabody Building Supply at 65 cents per foot.  Now they are all out, with no clue when another supply will be available.
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They had unprimed, finger jointed crown at 40 cents per foot, and I'm hoping that it can be installed and integrated with the original stock that I bought.  So I picked up forty feet and will hang the moulding this morning.
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After I inflate the grandkids snow tubes, I'll be up at the Sundance building checking this out.