Final answer:
The gross earnings of the salesperson who worked 40 hours one week with sales of $7,000 is $450.
Step-by-step explanation:
To determine the gross earnings of the salesperson, we need to calculate their hourly pay and commission. The salesperson worked 40 hours at an hourly rate of $9.50, so their base pay is 40 hours * $9.50/hour = $380.
To calculate their commission, we multiply their sales of $7,000 by 1%: $7,000 * 1% = $70.
The salesperson's total gross earnings are the sum of their base pay and commission: $380 + $70 = $450. Therefore, Option D, $760, is incorrect.