Dust mass, gas mass, and values of CO abundances, for different temperatures and taken for the entire system (both sources and the circumbinary disk). The CO abundances are calculated by assuming a gas-to-dust ratio of 100. For gas masses (blue squares), the uncertainties are ~0.3 % of the value and are imperceptible on the plot. The purple horizontal line shows the value of 2.7 × 10⁻⁴ for the abundance of CO with respect to H₂.