Answer:
Weighted average cost = 8.94 per unit
Average cost = $9
Explanation:
The weighted average cost o of valuation of inventory uses weighted average price. The weighted average price is computed by dividing total cost of quantity purchased till date by the quantity purchased. This average price is impacted by the relative weight (quantity) of the batches that make up the stock till date.
This price re-computed every time a new batch is received
The weighted average price for Sheffield
= (155× $8)+(600× $8) +( 105 × $10)/(155+600+105) units
= 7690/860 units
= 8.94 per unit
Average unit cost is a simple average method. It has the problem of been influenced by extreme prices during volatile periods.
Average unit cost
= ($8 + $9 + $10)/3
= $9 per unit