Table 2. Census costs by item.
| Item | Cost (USD) |
|---|---|
| Training (fixed): | |
| Daily salary of CON for 2 days | 11.63 |
| Daily salary of NECP manager for 2 days | 74.545 |
| Per diem of CON for 2 days (assume CON displaced from home) | 22.62 |
| Total training cost | 108.79 |
| Cost per EA: | |
| Personnel | |
| CON monthly salary Multiplied by 1.2 for overheads and divided by 22 for daily salary | 5.71 |
| CON per diem (assume CON not displaced from home) | 7.54 |
| Materials | |
| Stationery (Pens & Clipboard: 1/census taker) | 1.89 |
| Paper (average number of households per EA: 65; average number of people in EA: 712; therefore average number of people per household: 11, which could fit onto one piece of paper): 65 sheets per EA) | 0.50 |
| Plastic wallet (1/EA) | 0.56 |
| Phone credit (D50/week) | 0.38 |
| Transport | |
| Motorcycle depreciation (€1,735 cost + (£2,050 freight charges + £230 insurance for shipment of 7 bikes)). Life expectancy = 5 years Cost/day = cost of motorbike / (345 x life expectancy) | 1.52 |
| Fuel (D32/litre, assume 20km /litre). EA fuel cost = number of km x 32 / 20. Average number of km = 71.8km (based one just one visit to each EA) | 4.33 |
| Data entry (2 EAs/day, 1 NECP enterer) Average cost per EA of data entry = 0.5*(salary * 1.2 (overheads) /22) | 3.08 |
| Supervision | |
| Salary (Salary of NECP manager for 1 day/week, divide by 22) | 37.37 |
| Vehicle depreciation (Depreciation cost of vehicle: $49,900 + D23,000 insurance, licence & road tax. | 16.84 |
| 49,900/(345x10) = $14.464 = cost/day of vehicle | |
| D23,000 x 0.0377 = $867.1 | |
| $867.1 / 365 = $2.376/day of tax, licence etc. | |
| $2.376 + $14.464 = total cost of vehicle per day | |
| Fuel (to go to field one day/week): Average distance travelled to go into field for one day = 195km from Banjul to Farafenni. | 23.52 |
| Total per EA cost | 103.24 |
| Cost for 102 EAs | 10,530.48 |
| Total census cost for study area | 10,639.27 |
Assumptions:
- Costs were obtained in US Dollars (USD), British Pounds (GBP), and Gambian Dalasi (GMD). GMD and GBP costs were converted to USD using a historic currency conversion of an average of 366 days from the 01st January 2009 to the 1st of January 2010 (http://www.oanda.com/currency/historical-rates/). For this time period, 1GMD = 0.0377 USD, and 1GBP = 1.5665 USD.
- For training, the following assumptions were made:
- Two days’ training.
- Training was done at the Regional Eye Care Centre, so there are no facility costs.
- Training was done by the manager of the NECP, who has no per diem.
- For census taking, the following assumptions were made:
- One NECP census takers on a motorcycle per EA
- One census taker can census 1 EA/day (based on PRET)
- The census taker would not do a first separate trip to make a household head list