Answer:
Gross profit = $4,305
Explanation:
The average cost per unit  is the total cost of the goods available for sale divided by the total units of goods available
Average cost  per unit=
= (250× 6)  + (490 × 6) + (740 at $7 )/ (250 +490 + 740)
=$6.5
Cost of golds sold = 1,230 ×6.5 = 7995
Gross profit = Sales Revenue - Cost of goods sold
           = (1230 × 10) -  7,995
           = $4,305