Sandhill Company manufactures a product with a standard direct labor cost of $2$ hours at $$18\mathrm{.}00$ per hour. During July, $2600$ units were produced using $5300$ hours at $$18\mathrm{.}30$ per hour. The labor quantity variance was

$$1800$ U$.$

$$1830F.$

$$270U.$

$$1830$ U$.$