4. In the first month of operations, ABCC. opened a new store location and bought merchandise in the following order: January 1:300units @ \$7 January 8:450 units@\$8 January 29:750 units@\$9 Assuming that 900 units are on hand at the end of the month, calculate the cost of goods available for sale, ending inventory, and cost of goods sold under the (a) FIFO, (b) LIFO, (c) weighted average cost flow assumptions. Assume a periodic inventory system is used..

1. 4. In the sub-basement of the 600 3. Michigan Ave, building, a bone fbelieved to be a human
bonc) was found by the authorities, and Dr. Merciless Davis, ptovost of Columbiat Coliege
Chicago, has been called in to explain its presence. De. Davis clatims that it is not a akeleton in
her closet (and possible evidence of matdef), but is instead an artilaet borrowed by careless
neolosy professor Jeremy Atomos trom a local muscum years ago. and then forgetten. Caretul
analysis of the bone shovs that it contains some fidiocarbon (6C-1), whose activity is 0,746
decays per minute per gram at carbon. By comparison. modem organic samples have much more
radiocarbon, with activities around 13.56 decays per minute per gram of carbon. In determining
radiocarbon ages, R values are found by dividing the activity of the sample by the activity of
modern organic samples [we skip step 1 from the instructions, and go ditectly to step 2] R =
activity of sample / activity of modern organie sample We then find the corresponding aumber of
half-lives (for which we will use the graph labelled Figure 21, and then multiplying the number
of half-lives by 5,730 years (which is the half-life of radiocarbon!. Using this method, about how
old is the sample? Does your resule help clear Dr. Davis of possible murder charges?