Olivia imported x indentical pens at a cost price of $0.50 per pen. In phase 1, she sold 70% of the pens at a price that is 10% above the cost price. In phase 2, she sold each of the remaining pens at a price that is 40% of the selling price of each pen in phase 1. In the end, she had a total loss of $49. (a)Write down an expression in terms of x, for the total amount of money collected from the sale of pens from (i) Phase 1, (ii) Phase 2. (b) Hence, by forming an equation in terms of x, find the number of pens, x, that she has imported. (c)Express her total loss as a percentage of her cost price