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| Daily caloric requirement | |
| (i) Total body weight × 68 cal/kg/day | |
| (ii) 18 kg × 68 cal/kg/day = 1224 cal/day | |
| Daily number of dietary units | |
| (i) For 3 : 1 (fat : protein/carbohydrate) | |
| (a) 3 g fat/unit × 9 cal/g fat → 27 calories | |
| (b) 1 g protein or CHO/unit × 4 cal/g protein or carbohydrate (CHO) = 4 calories | |
| (c) 27 + 4 = 31 calories/unit | |
| (ii) Daily caloric requirement ÷ calories/unit = dietary units/day | |
| (a) 1224 ÷ 31 = 39 units/day | |
| Daily fat content | |
| (i) Dietary units/day × g fat/unit = g fat/day | |
| (ii) 39 units/day × 3 g fat/unit = 117 g fat/day | |
| Daily protein and CHO content (combined) | |
| (i) Dietary units/day × g protein or CHO/unit = g protein or CHO/day | |
| (ii) 39 units/day × 1 g protein or CHO/unit = 39 g protein and CHO/day | |
| Daily protein content = 1 g/kg/day | |
| (i) 1 g/kg/day × 18 kg = 18 g/day | |
| Daily carbohydrate content | |
| (i) Combined protein and CHO content − daily protein content = daily carbohydrate content | |
| (ii) 39 g protein and CHO/day − 18 g protein/day = 21 g CHO/day | |
| Divide allotment into 3 meals | |
(i) Fat: 117 ÷ 3 = 39 g/meal
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(ii) Protein: 18 ÷ 3 = 6 g/meal
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(iii) CHO: 21 ÷ 3 = 7 g/meal
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