Karika 28

śabdādiṣu pañcānāmālōcanamātramiṣyatē vr̥ttiḥ। vacanādānaviharaṇōtsargānandāśca pañcānām ॥28॥

Mental acts to sense sound and others, five in number, happen by thinking alone. Similarly, speech, manipulation, movement, excretion, and (sexual) pleasure are also five in number.

Types of mental acts, volitions, 'vr̥ttiḥ' are being described. Five mental acts to sense and five mental acts initiated towards physical response, in total they are ten in number.