A: 7
B: 13
C: 27
D: 33
[答案]:B[解析]:进销差价率=(期初存货进销差价+本期购入存货进销差价)÷(期初存货售价+本期购货售价)×100%=(30-21+50-31)÷(30+50)×100%=35%,期末存货成本=21+31-60×(1-35%)=13(万元)。[该题针对“存货的后续计量”知识点进行考核]