plicity, it is assumed that the customers and volume are divided 50-50 be- 

 tween bagged and bulk feed, except that loading will be done by one man 

 using a hand truck. (Hypothesis 4.) 



Under the first test, the same conditions can be used as under Hypotheses 

 1 and 2, and calculate time according to the delivery route formula and 

 other assumptions previously stated: 



Hopper-elevating truck: 



Route miles, 40, 28 + 



Rt =r 95 + 1(20) + 1(1.0) + 100(.20) + 1(.025(0) ) 



Rt = 118.0 min. 



Rt = 71 + 1(2.0) + 1(1.0) + 100(.20) + 1(.025(0) ) 

 Rt = 94 



Thus, with the hopper-elevating method as a pure system, it appears 

 from the preceding and succeeding calculations that the time requirements 

 for a route of 40 miles and 5 tons would be less than with the regular 

 bagged system, but more than those for the regular bulk system. In terms 

 of full use of the truck and driver, it seems probable that with the hopper- 

 elevating method, more miles and more tonnage would be indicated than 

 with the regular bagged system, but less miles and less tonnage than with 

 the regular bulk system. Admittedly, the precise values of miles and tons 

 in Tables 20 and 24 could be varied with different combinations chosen, 

 but herein the totals have been forced to equal 480 minutes, and an attempt 

 made to stay within reasonable mileage and quantities. The particular mile- 

 ages and quantities seem to work out rather conveniently in terms of the 

 various time rates considered. The reconciliation to 480 minutes follows: 



Combining the time analysis with the depreciation estimates and esti- 

 mates of variable costs other than labor results in the data in Table 24. 

 Comparing these results, particularly cost per ton, with those in Table 20, 

 indicate that for the 80 mile-10 ton calculations (Hypothesis 3) the hopper- 

 elevating method is cheaper than bulk, but may be more or less than bagged, 

 depending upon the truck chassis cost. 



With full use of driver's time (Hypothesis 4), the hopper-elevating 

 method appears cheaper than bagged, and may even be cheaper than bulk 

 if the assumptions of the analysis hold and truck chassis can cost less than 

 that for regular bulk equipment. If this be true, then the hopper-elevating 

 method, operated efficiently by one man, would be an alternative well worth 

 exploration. 



47 



