What was the southern viewpoint on trade at the convention?

Most of the southerners believe that slaves are essential for southern trades.

Even though small number of them did not think similarly, majority of The southerners view that the government should not intervene with the issue regarding slavery in the south.

Southern economy was supported mostly by agricultural sectors and they require large number of labor. They argue that freeing the slave would massively increase the cost and reduce states' income.