Comparison of the three and twelve month periods ended December 31, 2020 and 2019
Revenue
Total revenue for the three months ended December 31, 2020 was US$7,775,674, an increase of US$1,679,124, or 28%, from US$6,096,550 recognized in the comparative period in 2019. Total revenue for the year ended December 31, 2020 was US$31,749,693, an increase of US$6,653,385, or 27%, from US$25,096,308 recognized in the comparative period in 2019. Included in revenue of US$7,775,674 is US$2,081,598 related to acquisitions with the balance of US$5,694,076 derived from the legacy business. Revenue growth of 28% for the three months ended December 31, 2020 is made up of 34% due to acquisitions offset by negative organic growth of (6%) from the legacy business. As expected, we have seen our business impacted both positively and negatively by the COVID-19 pandemic. Our insurance, law enforcement and courts sectors were negatively impacted by COVID-19; however, some of this was offset by increased revenue from the conferencing and media as more of our customers migrated to online solutions. The primary reason for the negative organic growth for the year ended December 31, 2020 was the impact of COVID-19. In addition, travel restrictions have negatively impacted the ability to sell our technology services and software and many businesses have delayed buying decisions.
Cost of Sales
Cost of sales for the three months ended December 31, 2020 increased by US$1,145,746, or 31%, to US$4,809,709, from US$3,663,963 for the comparative period in 2019. Cost of sales for the year ended December 31, 2020 increased by US$1,323,116, or 9%, to US$15,599,437, from US$14,276,321, for the comparative period in 2019. The increase in cost of sales for the three months ended December 31, 2020 is primarily due to acquisitions made in Q1 2020. Cost of sales for the year ended December 31, 2020 includes an increase of US$3,797,881 from acquisitions made in Q1 2020, which is partially offset by COVID-19 subsidies of US$2,830,986.
Gross Profit
Gross profit for the three months ended December 31, 2020 increased by US$533,378, or 22%, to US$2,965,965, from US$2,432,587, for the comparative period in 2019. Gross profit for the year ended December 31, 2020 increased by US$5,330,269, or 49%, to US$16,150,256, from US$10,819,987, for the comparative period in 2019. The decrease in gross profit for the three months ended December 31, 2020 is primarily due to impact of COVID-19, reduction in volume, while maintaining non-variable employees on payroll. Also, post migration backlog resulted in additional overtime costs. In addition, accelerated hiring costs across all segments to change workforce profile to editors. Increase in gross profit for the year ended December 31, 2020 was primarily due to revenue growth through acquisitions along with wage subsidies.
Selling and Administrative Expenses
Selling and administrative expenses for the three months ended December 31, 2020 increased by US$398,864, or 16%, to US$2,892,376, from US$2,493,512, for the comparative period in 2019. Selling and administrative expenses for the year ended December 31, 2020 increased by US$2,080,390, or 23%, to US$11,034,902, from US$8,954,512, for the comparative period in 2019. The Corporation has taken appropriate measures to manage selling and administrative expenses in conjunction with the negative organic growth resulting from COVID-19. Increase in selling and administrative expenses for the year ended December 31, 2020 was primarily due to the growth in the number of employees compared to the same periods in 2019 primarily due to acquisitions along with professional service fees. Selling and administrative expenses for the year ended December 31, 2020 included US$1,203,327 in COVID-19 subsidies vs. US$0 recognized in the prior year.
Research and Development Expenses
Research and development expenses for the three months ended December 31, 2020 increased by US$12,472, or 5%, to US$288,146, from US$275,674, for the comparative period in 2019. Research and development expenses for the year ended December 31, 2020 increased by US$79,538, or 8%, to US$1,074,178, from