+16 Xavier sold some pairs of sneakers and sandals for $21 692. The total cost of a pair of sneakers and a pair of sandals is $374. Each pair of sandals cost 4/11 as much as the total cost of a pair of sneakers and a pair of sandals. 2/5 of the total footwear sold were sandals.
(a) How much did each pair of sandals cost?
(b) How many pairs of sneakers were sold?
