Complex sentence: If this large discrepancy must be attributed to more than fictitious issuing, a final explanation suggests that people had accumulated and saved headrights, which could be bought for about 50 pounds of tobacco each.
Split into simpler sentences: If this large discrepancy must be attributed to more than fictitious issuing, a final explanation suggests that people had accumulated and saved headrights. Headrights could be bought for about 50 pounds of tobacco each.