You wish to mentally estimate the total cost of items that have the following price: $1.85, $.98, $3.49, $9.78, and $6.18. rounding off the items to the nearest half-dollar, your estimate of the total cost of these items is

$22.5

Step-by-step explanation:

We are given these costs of the items: $1.85, $.98, $3.49, $9.78, and $6.18.

Let's round each of the cost to nearest half-dollar to mentally estimate the total cost:

$1.85 where 0.85 is closer to one so we round it off to $2.0

$.98 is rounded off to $1

$3.49 is rounded off to $3.5

$9.78 is rounded off to $10

$6.18 is rounded off to $6 since it was the closest to $6

So adding these all up, we get:

2 + 1 + 3.5 + 10 +6 = 22.5

Therefore, the estimated total cost will be $22.5.

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step-by-step explanation: