from $0.41 per gallon ($4.95 per MMBtu) in 2016 to $0.51 per gallon ($6.18 per MMBtu) in 2017. Also, there were 12 months of operations at the Miami Facility and Montego Bay Terminal for the year ended December 31, 2017, whereas the Miami Facility and Montego Bay Terminal were operating for eight and two months, respectively, for the year ended December 30, 2016.
Operations and maintenance
Operations and maintenance relates to costs of operating our Miami Facility, as well as our Montego Bay Terminal, exclusive of conversion costs reflected in Cost of sales. Operations and maintenance for the year ended December 31, 2017 was $7,456, which increased $2,251 from $5,205 for the year ended December 31, 2016. The increase is primarily a result of the Miami Facility operating for 12 months in 2017 in comparison to operating for eight months in 2016.
Selling, general and administrative
Selling, general and administrative includes employee travel costs, insurance, and costs associated with development activities for projects that are in initial stages and development is not yet probable. Selling, general and administrative also includes compensation expenses for our corporate employees, including our executives, as well as professional fees for our advisors. Selling, general and administrative for the year ended December 31, 2017 was $33,343, which increased $15,183 from $18,160 for the year ended December 31, 2016 primarily as a result of increased development activities and employee travel as well as increased headcount.
Depreciation and amortization
Depreciation and amortization for the year ended December 31, 2017 was $2,761, which increased $420 from $2,341 for the year ended December 31, 2016. The increase is primarily a result of 12 months of operations at the Miami Facility and the purchase of additional equipment and vehicles which were placed into service during 2017.
Interest expense
Interest expense for the year ended December 31, 2017 was $6,456, which increased $1,351 from $5,105 for the year ended December 31, 2016, primarily as a result of interest on the MoBay Loan of $3,611 and $643 and Miami Loan of $2,845 and $1,803 for the years ended December 31, 2017 and December 31, 2016, respectively, net of capitalized interest recognized during construction in the year ended December 31, 2016. During 2017, we raised equity capital, which funded a majority of our capital expenditures resulting in a decrease in capitalized interest compared to 2016. The increase in interest expense is partially offset by the reduction of interest expense on our corporate loan, which was repaid at maturity in June 2016.
Other (income), net
Other income, net for the year ended December 31, 2017 was ($301), which increased $248 from ($53) for the year, ended December 31, 2016, primarily as a result of an increase in interest income and realized foreign currency gain.
Loss on extinguishment of debt
Loss on extinguishment of debt for the year ended December 31, 2016 was $1,177, which was recognized as a result of the extinguishment of the corporate loan on June 3, 2016.
Tax provision (benefit)
Tax provision (benefit) for the year ended December 31, 2017 was $526, which increased $887 from ($361) for the year ended December 31, 2016 due to a decrease in net taxable losses in a foreign jurisdiction when comparing year ended 2017 to year ended 2016.