Amina has a jewellery business in a well-established shop. Her most recent income statement shows the following key figures: This year Last year Sales 600,000 500,000 Cost of goods sold 350,000 300,000 Gross profit 250,000 200,000 A recent survey by the trade association shows that average sales in the sector increased by 17.3% from a year earlier and the average gross profit margin of firms in the sector was 38.3%. Which one of the following is TRUE? Amina has a higher than average increase in sales, and a lower than average gross profit margin. Amina has a lower than average increase in sales, and a lower than average gross profit margin. Amina has a lower than average increase in sales, and a higher than average gross profit margin. Amina has a higher than average increase in sales and a higher than average gross profit margin