A sample of an ideal gas is taken through the cyclic process $\mathrm{a}\mathrm{b}\mathrm{c}\mathrm{a}$ as shown in the figure. The change in the internal energy of the gas along the path $\mathrm{c}\mathrm{a}$ is $-180 \mathrm{J}.$ The gas absorbs $250 \mathrm{J}$ of heat along the path $\mathrm{a}\mathrm{b}$ and $60 \mathrm{J}$ along the path $\mathrm{b}\mathrm{c}$ . The work done by the gas along the path $\mathrm{a}\mathrm{b}\mathrm{c}$ is: