Final Answer:
With an expected sales increase by 10% per month, if product X sells for $10 each, then the total sales for the first quarter of the year will be $14,400. The correct answer is b.
Step-by-step explanation:
Given that the number of units sold in January is 400 units, sales price per unit is $10, and monthly sales growth rate is 10%, then to calculate total sales for the first quarter (January, February, March) will be as follows:
January sales = 400 units × $10/unit = $4,000
February sales = January sales × 10% increase = $4,000 × 1.10 = $4,400
Sales in March = February sales × 10% increase = $4,400 × 1.10 = $4,840
Total sales for the first quarter = January sales + February sales + March sales
Total sales = $4,000 + $4,400 + $4,840 = $14,400
Therefore, the total sales for the first quarter of the year will be $14,400.
Sales in each subsequent month increase by 10% from the previous month. So, by applying this growth rate to each month's sales starting from January, the total sales for the first quarter can be computed. Therefore, the correct answer is b) $14,400.