That $238 million is a far greater number than $77 Million? What about that makes no sense?
The South produced more than 3 times the North in financial trade with Europe.
The Deep-cotton South did not produce exports of $238 million, rather in 1860 it produced $192 million in cotton exports.
The balance of $46 million is unclear where that was made -- doubtless much of it came from Border South and Midwestern states whose produce shipped by rail or steamboat to New Orleans and Baltimore.
Total US exports for 1860, including specie, came to $400 million, of which the Deep South's $192 million was certainly 50%.
The other 50% may or may not have come partly from Upper & Border South states, but here's the key point about that: when Civil War came, the Union quickly replaced those supposed "products of the South" with their own exports.
In 1861, the North quickly made economic adjustments and continued to prosper without Southern exports.