Wal-Mart Inc. reported the following activity for its equipment.

Beginning cost = $16.

Ending cost = $24.

Beginning accumulated depreciation = $4.

Ending accumulated depreciation = $5.

During the year an asset costing $3 was retired and scrapped. At the date of retirement this asset had accumulated depreciation of $2.

During the year the company made extraordinary repairs to equipment totaling $4. 8.

Using the above information, which of the following was the amount of equipment purchases during the year?

a. $8 b. $9 c. $10 d. $11 e. none of the above