Hall & Co Sells Calculators

Multiple Choice

Hall & Co sells calculators.At the beginning of June 100 Z800 scientific calculators were on hand for which the firm had paid $20 each.Purchases and sales for the month were as follows.
Date Purchases Unit Cost Sales
Units units
June 3 120 $21
10 150 $22
29 180
If Hall & Co uses a periodic system with a LIFO cost flow assumption June's cost of sales for the Z800 scientific calculators is:

A) $3890.
B) $3930.
C) $3980.
D) $4140.