CASHIER: OK, your total is $69.37, may I round it up to $70 even and contribute a donation to prostate cancer awareness?
CUSTOMER: Prostate cancer what? Research?
CASHIER: Prostate cancer awareness.
CUSTOMER: Awareness? People aren't aware of prostate cancer?
CASHIER: Well, this helps to make sure everyone is aware.
CUSTOMER: How so?
CASHIER: Well for example, me asking for donations helps promote awareness of it.
CUSTOMER: So my donation helps to pay you to ask for donations.
CUSTOMER: No thank you.