?$100 is received at the beginning of year? 1, $200 is received at the beginning of year? 2, and? $300 is received at the beginning of year 3. If these cash flows are deposited at 12? percent, their combined future value at the end of year 3 is? ________. A. ?$1,536 B. ?$ 727 C. ?$ 672 D. ?$1,245