I help a person to pay, usually i work in a market, i count money, i have a barcode machine to scan things... who am i?

i work in a traditional/modern market, i use knives, i sell meat, i cut meats and sell them to another people, who am i?

i make clothes, trousers, suits, shorts for everyone. i cut, i design, i make over fashion. everyday i use scissors and yarn to help me do the work. what is my job?