CALCULATIONS

**STEP
1:** (7.3kcal/mole ATP) x (1.0 mole / 6.022 x 10^{23} molecules)
= 1.2 x 10^{-23} kcal/ATP molecule formed

**STEP
2: **(1.2 x 10^{-23} kcal/ATP) x (50 ATP/synthase*sec)
= 6 x 10^{-22} kcal/synthase*sec

**STEP
3: **(6 x 10^{-22} kcal / synthase*sec) x (2000 synthase/mito.
= 1.2 x -10^{-18} kcal/mito.*sec

**STEP
4: **(1.2 x 10^{-18} kcal/mito.*sec) x (500 mito/cell)
= 6 x 10^{-16} kcal/cell*sec

**STEP
5: **(6 x 10^{-16} kcal/cell*sec) x (3 x 10^{13} cells/body)
= 1.8 x -10^{-2} kcal/body*sec

**STEP
6:**(1.8 x 10^{-2/} kcal/body*sec) x (86,400 sec/day)
= **1555 kcal/day**