Comstock's lifting expense and gathering expense came in at 37 cents and 20 cents, respectively, decreasing from 39 cents and 22 cents incurred in the fourth quarter of 2017. The company was able to lower DD&A cost by 22.4% year over year to $1.00 per Mcfe. Cash Flow, EBITDAX & Balance Sheet Comstock's operating cash flow was $95.6 million, reflecting a massive increase of 154% from the year-ago level of $37.6 million. Earnings before interest, taxes, depreciation, amortization and exploration (or EBITDAX) also increased handsomely. The metric increased 117% y/y to $112.5 million from $56 million in the year-ago period. As of Dec 31, 2018, the company had $23.2 million in cash and cash equivalents. The company had a long-term debt of $1,244.4 million, representing a debt-to-capitalization ratio of 68.6%. Reserve Growth As of Dec 31, 2018, Comstock's proved reserves totaled 2,424 bcfe of natural gas, reflecting 108.6% growth from the corresponding period of 2017.