Total mass accreted onto the fragments as a function of the clump L/M. Left: realizations with initial clump mass of 500 M_⊙. Right: realizations with initial clump mass of 1000 M_⊙. The temperature of each fragment used to convert the fluxes into total mass (scatter plot) has been assigned using MC simulations, following the ranges in Table 2. The span in mass marked by the shaded areas accounts for stochastic variations due to 1000 different MC runs. The color code accounts for the different initial conditions of the realizations, as described in Fig. 5. The horizontal dashed lines correspond to the initial condition on the clump mass: 500 and 1000 M_⊙, respectively.