Mr.Jackson operates a company with his two sons , James and Jerry. Jerry makes thrice as much as james , who works only for part time. Mr.Jackson makes $\$400$ per week more than Jerry. The total weekly payroll is $\$1800$ . How much does each family member earn per week ?

Question

$\begin{array}{1 1} a)\;\text{James}= \$100,\text{Jerry}=\$300,\text{Mr.Jackson}=\$1500 \\ b)\;\text{James}= \$200,\text{Jerry}=\$600,\text{Mr.Jackson}=\$1000 \\ c)\;\text{James}= \$300,\text{Jerry}=\$900,\text{Mr.Jackson}=\$600\\ d)\;\text{James}= \$150,\text{Jerry}=\$450,\text{Mr.Jackson}=\$1500 \end{array} $