Certainly! Here are the solutions with each line within the solutionordottedlines environment in math mode:                                  

                                                                                                                                             
 \begin{exercisebox}                                                                                                                         
      \begin{questions}                                                                                                                      
          \Question The profit \( P \) made each day by a store owner who sells CDs is given by the                                          
  formula \( P=5n-150 \), where \( n \) is the number of CDs sold.                                                                           
          \begin{parts}                                                                                                                      
              \Part[1] What profit is made if the store owner sells 60 CDs?                                                                  
              \begin{solutionordottedlines}                                                                                                  
                  \( P = 5n - 150 \) \\                                                                                                      
                  \( P = 5(60) - 150 \) \\                                                                                                   
                  \( P = 300 - 150 \) \\                                                                                                     
                  \( P = \$150 \)                                                                                                            
              \end{solutionordottedlines}                                                                                                    
              \Part[1] Make \( n \) the subject of the formula.                                                                              
              \begin{solutionordottedlines}                                                                                                  
                  \( P = 5n - 150 \) \\                                                                                                      
                  \( P + 150 = 5n \) \\                                                                                                      
                  \( n = \frac{P + 150}{5} \)                                                                                                
              \end{solutionordottedlines}                                                                                                    
              \Part[2] How many CDs were sold if the store made:                                                                             
              \begin{subparts}                                                                                                               
                  \sub                                                                                                                       
                                                                                                                                             