Actual sales(leaf limited)

Leaf limited has had a mixed year. It’s market share has improved 2% to 20% but the overall market had contracted by 5% in same period. The budgeted sales were 504000 units and standard contribution wea 12$ per unit. What is a level of actual sales?? 1) two percentage points up on Budget at 510080Units 2) three percentage down overall on Budget 488880 Units 3) three percent up on Budget at 519120units 4) up by a little over five and half percent to 532000 units Ans is d but I am not able to understand in this question. Can you please explain me . Thanks in advance