What year was it?
I have an old lumber price list from Dunn Lumber. I will give you some of the prices and you can guees what year it was from. By the way the prices were current as of Feb 2 of the year year in question. These prices were available to the general public. My job at that time was building engineer.
Kiln dried Spruce framing lumber premium #2 and better
2"X6"X10' $6.02 2"X6"X16' $9.63
2"X8"X10' $6.76 2"X8"X16' $13.52
Pressure treated Outdoor Wood .40CCA
2"X6"X10' $8.30 2"X6"X16' $13.82
2"X8"X10' $12.32 2"X6"X16' $21.47
OSB strand board sheathing 3/4"X4'X8' $12.90
CDX plywood Sheathing 1/2"X4'X8' $10.88
Good luck