Laura bought two salads, for 2 * 3 = $<<2*3=6>>6.
One kilogram of beef is two times more expensive than one salad, which means it cost 2 * 3 = $6.
So Laura spend 2 * 6 = $<<2*6=12>>12 on beef.
One kilogram of potatoes costs only 3 * 1/3 = $<<3*1/3=1>>1, and that's how much Laura paid for potatoes.
Laura bought two liters of juice, so she did spend on them 2 * 1.5 = $<<2*1.5=3>>3.
So in total Laura paid 6 + 12 + 1 + 3 = $<<6+12+1+3=22>>22.
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