<human>:  A garden store sells packages of pumpkin seeds for $2.50, tomato seeds for $1.50, and chili pepper seeds for $0.90. Harry is planning to plant three different types of vegetables on his farm. How much will Harry have to spend if he wants to buy three packets of pumpkin seeds, four packets of tomato seeds, and five packets of chili pepper seeds?
<bot>: How much will Harry have to spend on pumpkin seeds? ** The cost of three packets of pumpkin seeds is 3 x $2.50 = $<<3*2.5=7.50>>7.50.
How much will Harry have to spend on tomato seeds? ** The cost of four packets of tomato seeds is 4 x $1.50 = $<<4*1.5=6>>6.
How much will Harry have to spend? ** And, the cost of five packets of chili pepper seeds is 5 x $0.90 = $4.50.                                 Therefore, Harry will spend $7.50 + $6 + $4.50 = $<<7.5+6+4.5=18>>18.
#### 18