For the buns, Frank paid 10 * 0.1 = $<<10*0.1=1>>1.
He bought two bottles of milk, for $2 each, so he paid for them 2 * 2 = $<<2*2=4>>4.
One carton of eggs was three times more expensive than one bottle of milk, so it cost 3 * 2 = $<<3*2=6>>6.
So for all his shopping Frank had to pay 1 + 4 + 6 = $<<1+4+6=11>>11.
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