Costs and expenses. Total costs and expenses were approximately $430.1 million, or 93.4% of total revenues, for the three months ended June 28, 2020 as compared to $385.6 million, or 96.5% of total revenues, for the prior year comparable period. For the six months ended June 28, 2020, total costs and expenses were approximately $824.5 million, or 94.7% of total revenues, as compared to $778.5 million, or 97.5% of total revenues for the prior year comparable period. The increases in total costs and expenses, as a percentage of revenues, were primarily due to the following:
Domestic Company-owned restaurant expenses were $145.2 million, or 77.8% of related revenues, for the three months ended June 28, 2020, as compared to expenses of $132.0 million, or 80.6% of related revenues, for the prior year comparable period, primarily due to lower operating expenses on higher sales and lower food costs including the favorable impact of current year promotions, partially offset by higher labor and bonus expense. For the six months ended June 28, 2020, Domestic Company-owned restaurant expenses were $274.3 million, or 78.8% of related revenues, compared to expenses of $265.0 million, or 81.4% or related revenues, for the prior year comparable period. The 2.6% decrease was primarily due to the lower operating expenses on higher sales and lower food costs including the favorable impact of current year promotions, which more than offset higher commodities costs. These increases were partially offset by previously mentioned higher labor and bonus expense.
North America commissary expenses were $154.5 million, or 92.2% of related revenues, for the three months ended June 28, 2020, compared to $136.7 million, or 92.9% of related revenues for the comparable period in 2019. North America commissary expenses were $298.7 million, or 92.5% of related revenues, for the six months ended June 28, 2020, compared to $275.3 million, or 93.0% of related revenues, for the prior year comparable period. The 0.7% and 0.5% decreases in expenses, as a percentage of related revenues, for the three- and six-month periods, respectively, were primarily due to lower operating costs on higher volumes and lower delivery costs.
International expenses were $18.3 million, or 65.2% of related revenues, for the three months ended June 28, 2020 compared to expenses of $14.7 million, or 57.5% of related revenues, for the prior year comparable period. International expenses were $33.4 million, or 61.7% of related revenues, for the six months ended June 28, 2020, compared to $29.0 million, or 56.6% of related revenues for the prior year comparable period. The 7.7% and 5.1% increases in expenses as a percentage of revenues were primarily due to lower margins at our United Kingdom commissary and lower revenues from royalty support provided to certain franchisees.
Other expenses were $51.3 million, or 94.7% of related revenues, for the three months ended June 28, 2020 compared to expenses of $42.0 million, or 96.3% of related revenues for the prior year comparable period. For the six months ended June 28, 2020, Other expenses were $97.3 million, or 95.6% of related revenues, as compared to $86.1 million, or 97.7% of related revenues, for the prior year comparable period. The 1.6% and 2.1% decreases for the three- and six- month periods, respectively, were primarily due to higher margins from our online and mobile ordering business, partially offset by lower revenues at our printing subsidiary.