Question

1. airbag backpack costs

$600 $450 $350 $650 $800
$300 $550 $500 $600 $750

Explanation:

Assuming the problem is to find the mean (average) cost of the airbag backpacks:

Step1: List all the costs

The costs are: $600, $450, $350, $650, $800, $300, $550, $500, $600, $750.

Step2: Sum all the costs

First, add them up: $600 + $450 + $350 + $650 + $800 + $300 + $550 + $500 + $600 + $750.
Let's calculate step by step:
$600 + 450 = 1050$;
$1050 + 350 = 1400$;
$1400 + 650 = 2050$;
$2050 + 800 = 2850$;
$2850 + 300 = 3150$;
$3150 + 550 = 3700$;
$3700 + 500 = 4200$;
$4200 + 600 = 4800$;
$4800 + 750 = 5550$.

Step3: Count the number of costs

There are 10 data points.

Step4: Calculate the mean

Mean = $\frac{\text{Sum of costs}}{\text{Number of costs}}$ = $\frac{5550}{10}$ = $555$.

Answer:

The mean cost of the airbag backpacks is $\$555$.

(If the problem was different, e.g., median, mode, range, the steps would change. Since the problem wasn't specified, I assumed mean as a common statistical calculation for such data. If you intended a different calculation, please clarify the question.)