Dear PAO,

My son has been saving for a pair of shoes he wanted to buy. Every day after school, he would drop several coins from his daily allowance into a small jar in his closet. He also collected spare change from our shopping or dining purchases. After months of saving every coin he could find, my son finally saved enough coins to buy the shoes. Unfortunately, when we arrived at the store, the sales lady told us they could not accept the P5, P10 and P20 coins worth P2,500. Is the store correct in declining the payment of my son in coins?