Task Four: Algebra

I receive $120 in pocket money per month & this is how I spend my pocket money on each month:

• Newspapers (N) - $2 for each Sunday Herald Sun
  
• Books (B) - $10 for one book
  
• PC Games (G) - $20 for one PC Game
  
• Clothes (C) - $5 for one item of clothing
  

Sample Equations (Note: T - total:)

• Books - T=B2
• Newspapers - T=N5
• PC Games - T=G2
• Clothes - T=C2
  
• TOTAL SPENT EACH MONTH - $80
  

Different Situations:

• Books - T=B1/Newspapers & PC Games - Same As Original/Clothes - T=C4
• Books - T=B4/Newspapers - Same As Original/PC Games - T=G1/Clothes - T=C2
• Books - Same As Original/Newspapers - T=N10*/PC Games - Same As Original/Clothes - T=C0 (Zero)

* Meaning I have to buy both the Sunday Age & the Sunday Herald Sun - I can't buy two of the same newspaper!