The following data relate to direct materials costs for February:

Materials cost per yard: standard, $$1\mathrm{.}90$; actual, $$2\mathrm{.}05$

Yards per unit: standard, $4\mathrm{.}70$ yards; actual, $5\mathrm{.}15$ yards

Units of production: $9,200$

The direct materials quantity variance is

a$.$ $$7,866\mathrm{.}00$ favorable

b$.$ $$8,487\mathrm{.}00$ unfavorable

c$.$ $$7,866\mathrm{.}00$ unfavorable

d$.$ $$8,487\mathrm{.}00$ favorable