John 12:
3 Then Mary took about a pint of expensive perfume, made of pure nard, and she anointed Jesus’ feet and wiped them with her hair. And the house was filled with the fragrance of the perfume. 4 But one of his disciples, Judas Iscariot, who was later to betray him, objected, 5 “Why wasn’t this perfume sold and the money given to the poor? It was worth a year’s wages.
Matthew 26:
14 Then one of the Twelve—the one called Judas Iscariot—went to the chief priests 15 and asked, “What are you willing to give me if I deliver him over to you?” So they counted out for him thirty pieces of silver. 16 From then on Judas watched for an opportunity to hand him over.
Mary's expensive perfume was worth how many pieces of silver?