“Lemme see.”
Lemme represents informal spoken let me. Lemme see. means “Let me look.” Like gimme in A2-35 and gonna in A2-04, it belongs in casual conversation. Use Let me see. in standard writing.
A2-46 / CEFR A2 / EPISODE 46
Talking about clothes bought online
SceneIn Tina's room. Another disappointing online order has arrived, and Frank takes a look.

WORDS & CONTEXT
Lemme represents informal spoken let me. Lemme see. means “Let me look.” Like gimme in A2-35 and gonna in A2-04, it belongs in casual conversation. Use Let me see. in standard writing.
In American English, on sale means offered at a reduced price, rather than simply available to buy. Tina uses the discount to justify buying three outfits.
Each means for every one, and a spare is an extra kept in reserve. Tina did not pay ten dollars for three; she paid ten dollars per jacket and bought three. The brown one is the same as Frank's usual jacket, so he offers to buy it as a spare.
Even adds emphasis: "even ..., too." When Tina tries to get him to take the blue and pink ones as well, Frank turns them down: even his spare jackets are brown. The punchline plays on Frank's particular taste in clothes: he wears the same outfit every day and keeps even his spares the same color.