Looking at Schlumberger (SLB) annual report for 2015.
So...in millions
EBIT = $2,991
Depreciation & Amortization = $4,078
EBITDA = $2,991 + $4,078 = $7,069
Gross Profit = $7,308
So EBITDA is pretty much equal to gross profit which implies they had almost no operating expenses. If I go to...