Does bidding for "everything" include dumpster and porta potty

[Bob T.]

When request bid from General Contractors my SOW stated bid to include everything from gutting to buy materials and rehab per plan.  BP member's suggested the bid to separate for labor and materials.    I was surprised by my GC's final bill line item called miscellaneous (which is not labor nor materials), this include dumpster rental and porta potty.   The cost of this item is few thousand that my team didn't budget for, but I would think as a contractor he would have an idea on long he need the dumpster / porta potty.  

Before I get all the contractor mad I at me, I did paid in full.   I wouldn't want his worker have to pee in the yard  or mess up the new bathroom :)  But this leave me wondering, was it something I missed in my SOW?   Shouldn't dumpster  and potra potty rental be include in the materials?   

Maybe I need a statement that covers EVERYTHING?