ANSC 1000
Lab Final Problems  

Show all work and circle your answer for full credit.  
Do your work in a neat and orderly manner such that 
we can follow your methods.  Carry all answers to 
2 decimal places (for example, 2.43 or 1.70).  Units 
must be included with your answer.
  
1. (30 points)  You purchased steers weighing 450 pounds to
   put in the feedlot.  You expect to market them when they
   weigh 1100 pounds.  You expect them to have an ADG of 3.0
   lb/day and a F/G of 7.5 over the entire feeding period.
  
   A. (4 points)  How many days will you have these steers on
      feed?   (Round to a whole day.)
  
           1100 - 450 = 650 lb. gain
    
             650 lb. gain
           ----------------  = 217 days
           3.0 lb. gain/day  
  
  
   B. (4 points)  If the diet you will be feeding is 30%
      broiler litter and the rest is corn, how many pounds of
      each ingredient will you need to purchase per steer?  
  
                           7.5 lb feed
           650 lb. gain X ------------- = 4,875 lb. feed
                             lb. gain
  

           4,875 lb. feed X .3 broiler litter = 1,462.5 lb. B.L.

           4,875 lb. feed X .7 corn = 3,412.5 lb. corn
  
  
   C. (4 points)  If corn costs $3.00/bu and broiler
      litter costs $25.00/ton, what is the cost of feed
      per steer?   (One bu. of corn = 56 lb.   One ton
      = 2000 lb.)
  
      $3.00/56 lb. = $.0536/lb for corn 
                     X 3412.5 lb. corn = $182.81 for corn  
  
      $25/2000 lb. = $.0125/lb for B.L.
                     X 1462.5 lb. B.L. = $ 18.28 for B.L.
                                         ------------------
                                 TOTAL = $201.09 for feed
  
  
   D. (3 points)  Referring back to part C, what are the feed
      costs per hundredweight of gain?
  
            650 lb. gain = 6.5 cwt gain

            $201.09 feed cost
            -----------------  = $30.94/cwt gain
              6.5 cwt gain
  

   E. (6 points)  If the purchase price of the steers was
      $84.50/cwt, total feed costs were $220, and other costs
      added up to $85, how much would you have to sell them
      for to break even?  (Answer in $/cwt)
 
          450 lb X $.845/lb = $380.25 for steer
                              $220.00 for feed
                              $ 85.00 other
                             ------------------
                              $685.25 Total Costs


          Need to receive $685.25 for an 1,100-lb. steer:

              $685.25
              -------   = $.6230/lb.  =  $62.30/cwt
              1100 lb  
  
  
   F. (3 points)  Referring back to part E, what price (in
      $/cwt) would you have to receive for the steers to make
      a $25 profit?
  
           $685.25 total costs
          +$ 25.00 profit
          -------------------- 
           $710.25 that you need to receive for the 1,100-lb. steer


           $710.25
           --------   = $.6457/lb.  =  $64.57/cwt
           1100 lb
  

   G. (4 points)  If when you sold these steers, you received
      $66/cwt instead of your break even price in part E, 
      what would the margin be?  (You must state whether it is
      negative or positive.)
  
           Margin = the difference in selling price and purchase
                    price in $/cwt.

           $66.00/cwt - $84.50/cwt = $18.50 NEGATIVE margin 
  
  
   H. (2 points)  A cow had her first calf on February 2,
      1993, when she was 24 months old.  Her second calf was
      born February 20, 1994, and her third calf was born
      February 28, 1995.  What is her calving interval? 
  
      Calving interval = the average number of days (or months)
                         between calves being born.

           Feb 2 --> Feb 20 = 365 + 18 = 383 days
           Feb 20 --> Feb 28 = 365 + 8 = 373 days


             383 + 373
            -----------  = 378-day calving interval
            2 intervals