Dosage of foam comprising an anionic/zwitterionic surfactant mixture

A dosage of foam comprising a volume of from about 7.5 cm3 to about 70 cm3 of the foam, wherein the foam comprises:

• a) a detersive surfactant system comprising:
• i) from about 15 wt. % to about 30 wt. % anionic surfactant selected from the group consisting of sodium undecyl sulfate, sodium laureth sulfate, sodium lauroyl isethionate, sodium cocoyl isethionate, sodium laurethsulfosuccinate, sodium laurylsulfosuccinate, and mixtures thereof:
• ii) from about 2 wt. % to about 12 wt % zwitterionic surfactant selected from the group consisting of lauramidopropyl betaine, cocoamidopropyl betaine, lauryl hydroxysultaine, and mixtures thereof;
• b) from about 0.00005 g to about 0.25 g of a cationic deposition polymer by weight of the foam;
• and
• c) from about 45 wt. % to about 78 wt. % water;
• wherein:
• 1) the foam has a foam density of from about 0.05 g/cm3 to about 0.35 g/cm3;
• 2) the foam has a plurality of bubbles comprising a bubble size distribution having a Sauter mean radius R32 of from about 5 μm to about 100 μm;
• and
• 3) the foam has a β value of from about 0.0075 g/cm3 to about 0.1575 g/cm3.