The following computation of the materials variances of Weitzen Foods is incomplete. The missing data are labeled (a) through (d).

Materials price variance = 3,640 pounds ×

[(a) standard price - $9.00 actual price] . . . . . . . . . . . . . . . . $910 Unfavorable

Materials quantity variance = (b) ×

[3,800 pounds - (c) actual quantity] . . . . . . . . . . . . . . . . . .    $ (d)

Supply the missing data for items (a) through (d). Prepare a caption describing the item, as well as indicating the dollar amount and physical quantity. Briefly explain each answer, including how you determined the amount.