Colicchio Corporation acquired two inventory items at a lump-sum cost of $60,000. The acquisition included 3,000 units of knife X001, and 3,000 units of knife X002. X001 normally sells for $20 per unit, and X002 for $10 per unit. If Colicchio sells 1,000 units of X002, what amount of gross profit should it recognize?
a. $1,000.
b. $6,670.
c. $10,000.
d. $3,330.