please show work for b. Also, please check to see if I have the correct answer for a.

Journalize the following transactions for Combs Company. (a) Purchased 6,800 units of raw materials on account for $12,880. The standard cost was $13,600. (b) Issued 6,670 units of raw materials for production. The standard units were 6,810. (Credit account titles are automatically indented when amount is entered. Do not indent manually.)