Which of the following contracts requires a writing under the UCC, Article $2?$ a$.$ A toy manufacturer contracted to sell dolls valued at $$10,000$ to a department store.Ob$.$ Jeremy, a full$-$time student, sold his snow blower to a friend for $$450.$ c$.$ Tobias Department Store contracted to sell Jenny a $$400$ doll. d$.$ Kayla, a full$-$time student, purchased a used computer from Office Plus for $$300.$