Since chris gets paid $ 110 and 18% with tips then we must calculate the tips he had last weekend.
[tex]\begin{gathered} 926\rightarrow100\text{ \%} \\ x\rightarrow18\text{ \%} \\ x=\frac{18\cdot926}{100} \\ x=166.68 \end{gathered}[/tex]Then we add up the $ 110 he makes each weekend, plus the tips we have already earned.
[tex]110+166.68=276.68[/tex]So, Chirs made $ 277 last weekend.