Jamal buys 33 bolts that cost $0.38 each. Part A Which equation represents the best estimate for the total cost of all of the bolts? A. $0.30 × 30 = $9 B. $0.40 × 30 = $12 C. $0.50 × 30 = $15 D. $0.40 × 40 = $16 Part B What is the actual total cost of all of the bolts? E