What about?
We can avoid the cleaning expense if we have the subcontractors, for example, M/S XYX who always leave their rubbish on the site, clean the site weekly.
If subcontractor used to clean the site at least weekly, we can avoid this kind of expenses, for example M/S XYX and M/S YYX who are always leave their rubbish on site.
What about?
We can avoid the cleaning expense if we have the subcontractors, for example, M/S XYX who always leave their rubbish on the site, clean the site weekly.