Find the number of luminaires needed (both fractional number and then rounded off to nearest whole number) in an office

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Find the number of luminaires needed (both fractional number and then rounded off to nearest whole number) in an office given the following formula and supplied information: Number of luminaires = (AWP x EWP ) / (lumens/lamp x lamps/luminaires x CU x LLF TOTAL) Where: Ewp = average maintained illuminance on the work plane Φ (TOTAL) = total system lamp lumen output CU = coefficient of utilization LLF TOTAL = Total light loss factor Awp = area of the work plane
Table 1 Ranges of Illuminances Type of Activity Reference Work Plane Lux Footcandles Public spaces with dark surroundings 20-30-50 2-3-5 Simple orientation for short temporary visits 50-75-100 5-7.5-10 General Lighting Throughout Spaces Working spaces where visual tasks are only occasionally performed 100-150-200 10-15-20 Performance of visual tasks of high contrast or large size 200-300-500 20-30-50 Performance of visual tasks of medium contrast or small size 500-750-1000 5-75-100 Illuminance on task Performance of visual tasks of low contrast or very small size 1000-1500-2000 100-150-200 Performance of visual tasks of low contrast and very small size over a prolonged period 2000-3000-5000 200-300-500 Illuminance on task, obtained by a combination of general and local Performance of very prolonged and exacting visual tasks H 5000-7500-10000 500-750-1000 Performance of very special visual tasks of extremely low contrast and small size 10000-15000- 20000 (supplementary lighting) 1000-1500-2000 1 ESNA Lighting Handbook Table 2: Coefficient of Utilization - All floor reflectances = 20% RCC% 80 80 80 70 70 70 50 50 RW% 70 50 30 70 50 30 50 30 RCR 0 .97 97 97 94 94 94 90 90 1 .89 86 .82 87 84 81 80 78 2 .82 76 .71 .80 74 70 71 68 .75 .67 .61 73 66 61 64 59 .69 60 54 68 59 53 57 52 .64 54 47 62 53 47 52 46 59 49 42 58 48 42 47 41 .55 45 38 54 44 38 43 37 51 41 34 50 40 34 39 34 31 36 31 48 38 31 47 37 45 35 29 44 34 28 34 28 7 8 9 10 Illuminance Category A B с D E F G