How does one handle a Negative value for a Cumulative Adjustment to Basis on a K1?

I purchased stock in a LLC in 2016 and sold it in 2017. I received a K1 which included a sales schedule. I provided my sales proceeds(3)and purchase amount(4).  The company provided negative values for the cumulative adjustment basis of $-2304(5) and ordinary gain of $1677(7) In their instructions, they stated to come up with Total gain/loss(6),subtract the amounts in 4 and 5 to determine the total gain and loss(6).  Subtracting a negative number results in adding it to my basis and thus reducing my overall taxable gain. Is this approach correct?