Angela has 6+3*20=<<6+3*20=66>>66 plates.
Angela has 1/2*66=<<1/2*66=33>>33 cutlery.
Sharon wants to buy 1/2*20=<<1/2*20=10>>10 pots.
Sharon wants to buy 3*66-20=<<3*66-20=178>>178 plates.
Sharon wants to buy 2*33= <<2*33=66>>66 cutlery.
Sharon wants to buy a total of 10+178+66=<<10+178+66=254>>254 kitchen supplies.
#### 254