1 (a) In 2013, Mary worked for Company A. Her salary for the year was $18 750. (i) $5625 of her salary was not taxed. What percentage of her salary was not taxed? (ii) The remaining $13 125 of Mary’s salary was taxed. 22% of this amount was deducted for tax. Mary’s take-home pay was the amount remaining from $18 750 after tax had been deducted. She received this in 52 equal amounts as a weekly wage. Calculate Mary’s weekly wage. (iii) In 2012 Mary had worked for Company B. When she moved from Company B to Company A, her salary increased by 25% to $18 750. Calculate her salary when she worked for Company B. (b) The rate of exchange between pounds (£) and Indian rupees (R) is £1 = R87.21. The rate of exchange between pounds (£) and Swiss francs (F) is £1 = F1.53. (i) Mavis changed £750 into Indian rupees. How many rupees did she receive? (ii) David changed F450 into pounds. How many pounds did he receive? (iii) Brian changed R50 000 into Swiss francs. How many Swiss francs did he receive?