One-fourth of a loaf of bread is ``$$1$$.'' Half a loaf of bread is ``$$2$$.''  One-fourth of a loaf of bread: $$6 \div (2-1) =6$$. A whole loaf of bread: $$6 \times 4 =24$$. 
Half a loaf of bread costs $$6$$ pence more than one-fourth of a loaf of bread. How many pence does a whole loaf of bread cost? 
[a] $$6$$ 
[b] $$12$$ 
[c] $$18$$ 
[d] $$24$$ 
[e] $$30$$ 