I need a guesstimate to replace a load bearing beam in St. Louis.

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Can anyone give me an guesstimate on what it would cost to replace a load bearing beam in a basement that is 50 feet long. It would be (3) 2x12s and a new 6x6 post that is 8 feet tall every 8 feet. So 6 post, 8 feet tall that also go into ground on concrete 36 inches deep. Not looking for someone to come out, just throw out a ball bark # on here please.